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UPDATE: We have an updated tier list for That Time I Got Reincarnated as a Slime ISEKAI Memories for the current month. Read it here.
Note that this tier list is for Battle Characters in Slime ISEKAI Memories. For Protection Characters, you should be using the one that gives increased elemental damage according to the enemies’ weakness. Preferably, 5★ Protection Characters.
With that out of the way, let’s dive into the list:
SSS Tier
For the truly overpowered amongst the overpowered.
[Time Traveler] Masked Hero
Element: Space | Damage type: Physical | Secret Skill: Multi-target
In a game whose meta has been dominated by “who can buff themselves to do more damage than others”, Masked Hero is the one exception to this meta. Sure, she doesn’t output insane single-target damage, but she can do something no one else in the game can—give you an extra turn.
You don’t need to be a math genius to know how much extra damage a whole new turn will give you, or whether that will mean the difference between a win or a boss pulling off a Secret Skill and wiping out your team. Masked Hero buys your whole team another turn (without extending the turn counter), can guarantee your team will crit while making enemies’ crit resistance weaker AND increase the Protection gauge. Absolutely busted.
[The Proud Dragon Demon Lord] Milim Nava
Element: Space | Damage type: Physical | Secret Skill: Single-target
Despite her nerf, Octagram Milim is still one of the best units in this Slime ISEKAI Memories tier list. While there are many new Space units who can do her job, Octagram Milim still does it better. Octagram stats gives her higher ATK, HP and DEF compared to any other non-Octagram unit.
Above all else, it’s her damage that makes her invaluable. Her low SP cost first skill guarantees that her attacks will pierce. Combine that with another powerful team-wide buff from characters like Space Rimuru, New Year’s Milim, or the new Masked Hero, and you have one of the highest damage potential in the game.
[Dragon Fist] Milim Nava
Element: Space | Damage type: Magical | Secret Skill: Single-target
Space Milim is basically Octagram Milim, but deals magical damage instead of physical. She doesn’t have the latter’s roided up stats, but she’s the best buffer for the best element in the game. Sure, she can only buff space-element characters’ ATK, but notice how the previous few overpowered characters are all space units?
She doesn’t just buff the team, she also buffs her own ATK and the effectiveness of other buffs on herself thanks to the Drago status effect. Having both Space Milim and Octagram Milim on your team is essentially a death sentence to the enemy.
SS Tier
The best of the best—their skill sets put them above all the other characters.
[The Necromancing Devil] Diablo
Element: Wind | Damage type: Magical | Secret Skill: Single-target
ATK buff, DEF debuff and guaranteed crit make Wind Diablo one of the hardest-hitting units in the game who’s not named Milim. In fact, the only reason why he’s not in SSS tier is because his buffs only work on himself and not the team.
[The Enthusiastic Player] Milim Nava
Element: Fire | Damage type: Physical | Secret Skill: Single-target
The newest addition in January 2022, New Year’s Milim aka Fire Milim is an incredible unit. Stat-wise, she has high ATK. Her first skill basically guarantees your team will always crit and is tied with Wind Milim and Space Rimuru for amazing team-wide buffs. However, unlike those two, [The Enthusiastic Player] Milim Nava has a single-target ultimate, making her perfect against bosses, which makes up the endgame content.
[The Queen of Nightmares] Luminus Valentine
Element: Earth | Damage type: Magical | Secret Skill: Single-target
Both of Luminus’s skills easily put her into SS-rank in this Slime ISEKAI Memories tier list. She may not have an amazing team-wide buff like the others in this tier, but she can debuff enemies’ magical resistance, while boosting her own magic ATK. The cheap cost and practicality of this ability are superb.
On top of that, she can stop a boss from performing a Secret Skill as she can reduce their gauge, while increasing her own! Earth Luminus hits hard, is consistent, and being able to stop an enemies’ Secret Skill is great insurance.
[Chancellor of Tempest] Rimuru Tempest
Element: Space | Damage type: Physical | Secret Skill: Multi-target
Despite space units getting so many overpowered new characters, Space Rimuru is still an amazing buffer who can fit his slimy body into almost any team composition.
Both of [Chancellor of Tempest] Rimuru Tempest skills are incredibly useful. All of Creation is the strongest non-element specific ATK buff in the game, while Magic Sense is a 20% DEF buff that lasts two turns. When you have 6 of the same Souls, pop All of Creation for incredible damage. Sure, you might have better characters to include in your space team lineup over him, but Space Rimuru is still an incredible pick for just about any element.
[Runaway Bride] Shion
Element: Light | Damage type: Physical | Secret Skill: Single-target
After a bit of testing, I feel that Bride Shion just manages to squeeze her way to SS in this Slime ISEKAI Memories Tier List. This is mainly due to 2 reasons—consistent nuking potential and light element.
Shion’s 30% self-ATK buff can potentially get to around 50% with the right teammates and setup. Thanks to its cheap cost, it’s possible to use it multiple times in a fight unlike many of the other teamwide buffs which cost a lot of skill points.
Even if you don’t build your team around her, Bride Shion still excels as a 5th pick in many teams of different elements. Thanks to her light element, you can swap her in around the 3rd or 4th turn, activate her skill and rack in a lot of damage with minimal setup. I find her very easy to use, and she becomes extremely deadly in a pure light team.
S Tier
Extremely useful characters who have a place even in teams that are not of their element.
[The White Ice Dragon] Velzard
Element: Water | Damage type: Magical | Secret Skill: Single-target
Velzard easily has the potential to move up a tier on this list as she’s the only unit in Slime ISEKAI Memories who can inflict Frostbite on enemies. On top of poisoning them, Frostbite makes the debuffs affecting enemies more effective for a low skill point cost. She needs to be paired with an extremely powerful debuffer, like Raphael, in order to be truly effective. Even without that, she’s still an extremely strong single-target Secret skill unit with a self-ATK buff.
[Beastmaster] Carrion
Element: Space | Damage type: Physical | Secret Skill: Single-target
Carrion fits an interesting niche in the space team, as he’s the only unit who has a cheap team-wide buff compared to the others’ expensive buffs. As the only unit in the game who could buff crit damage, he works well in many teams that rely on increasing crit rate.
Furthermore, his self-ATK buff lasts 2 turns instead of the usual one. His second skill may be a run-of-the-mill Soul Change, but do not underestimate Carrion—he brings a lot of value to your lineup.
[Dragon Majin] Milim Nava
Element: Wind | Damage type: Magical | Secret Skill: Multi-target
I moved Milim from SS to S rank in this tier list due to the unfortunate reason of power creep in Slime ISEKAI Memories. She’s still really, really good, but we’re getting so many great new units that the difference in power can be felt.
Wind Milim’s first skill, Dragon Power, increases your Soul of Combos (aka ultimate) damage by a whopping 60%. Thanks to this skill, Wind Milim lets you clear stages well above the recommended EP and makes her useful in any element team. Just unleash three Secret Skills the same turn after activating this buff and watch as your enemies’ health disintegrate.
[Seal Releaser] Veldora Tempest
Element: Dark | Damage type: Physical | Secret Skill: Multi-target
Veldora can increase your Soul of Combos damage by 50% instead of Milim’s 60%. Even though it is 10% weaker, it is still very powerful. Use either Veldora or Wind Milim in your team, but not both at the same time.
[Lord of Darkness] Guy Crimson
Element: Fire | Damage type: Physical | Secret Skill: Multi-target
Guy appears to have taken notes from Veldora. Not only do both of them proudly display their abs, but they also have the same, inferior Wind Milim buff of increasing Soul of Combos damage. However, Guy’s buff is even weaker than Veldora’s buffing damage by 40% instead of Veldora’s 50%. As a trade-off, Veldora’s buff also has the added effect of reducing enemy crit resistance, so it’s not the end of the world.
[Lord of Darkness] Guy Crimson does make up for it with a useful DEF UP seal, which trivialises certain bosses in the game. On top of that, Guy does have the hardest hitting multi-target Secret Skill in the game, dealing 290% damage as opposed to others’ 270%.
[Budding of Deep Green] Treyni
Element: Earth | Damage type: Magical | Secret Skill: Single-target
Not only is Treyni the best healer in the game, but she also has a single target ultimate, making her perfect for many of the harder endgame content. She’s also an incredibly tanky character with high DEF and will save your team more often than you can count. Since a lot of the game’s missions require you to clear them without any character dying, Treyni will help you achieve that.
[Queen of Yule] Luminus Valentine
Element: Wind | Damage type: Physical | Secret Skill: Single-target
Luminus’ skill heals 5% less HP than Treyni’s, but also costs 5 Skill Points less, making her a fantastic alternative to Treyni. As a physical wind-element character with a single target nuke, this maid is a must-have support for wind teams, but also great for other elements. She’s also the only character in the game at the moment who can change 1 Soul of Divine Protection and 1 Soul of Secrets into up to 2 Soul of Skills.
[King of an Armed Nation] Gazel Dwargo
Element: Light | Damage type: Physical | Secret Skill: Single-target
Single target ultimate are generally better than multi-target ones because most of the game’s harder content features a single, powerful enemy instead of a group. Guess what? Gazel is a consistent, hard-hitting single target nuker that you wouldn’t go wrong with. All of his buffs focus on increasing his offensive power (ATK, Crit rate and Crit damage). Above all else, his skills have very low cost, so you can activate expensive skills such as Space Rimuru or Wind Milim’s buff on the same turn to reach insane damage.
[Brave Knight Girl] Alice Rondo
Element: Water | Damage type: Physical | Secret Skill: Single-target
Knight Alice has the whole package. She’s the superior version of [Steel Annihilator] Shion, possessing a similar pierce rate buff, but with the more useful single-target Secret skill. The buff is a bit less effective though, since unlike Shion’s buff which also improves pierce power, Alice’s debuffs enemies’ water resistance, which makes it a lot more limited.
At the very least, she does have a Soul Change, albeit a more expensive one.
[The Flashing Blade] Leon Cromwell
Element: Light | Damage type: Magical | Secret Skill: Single-target
Octagram Leon is designed to serve Secret Skills hard and fast. For a cheap cost, he can easily increase the damage of his Secret Skill by 50%. He can also change all of his own Souls to Soul of Secrets, which supplements this.
Octagram Leon desperately requires support and buffs in order to perform better. Pair him up with the non-Octagram version of himself and watch the damage numbers skyrocket.
A Tier
Great characters who are the go-to picks for teams of their respective element.
[Instructor of the Flashing Sword] Hakurou
Element: Wind | Damage type: Physical | Secret Skill: Single-target
Hakurou is the definitive single target nuker for wind teams. Even though he has an amazing buff in the form of Keigoku, which reduces enemy DEF and increase your team’s Crit rate, its expensive cost means that you’ll rather be choosing Wind Milim or Space Rimuru’s buff 9/10 times. This is why I put Hakurou below Gazel in A tier as he has less synergy with the other top tier units. Still a great pick regardless.
[The Black Progenitor] Diablo
Element: Dark | Damage type: Physical | Secret Skill: Single-target
The hardest-hitting single target nuker for dark teams. As we mentioned in our coverage of the Diablo event, he’s extremely similar to Gazel, just with lower ATK and with a Soul change instead of a second buff. If his Soul change changed 2 Souls instead of just 1, I would’ve put him in S tier with Gazel.
[Ebony Demon] Diablo
Element: Dark | Damage type: Magical | Secret Skill: Single-target
When [Ebony Demon] Diablo uses his Secret Skill, he can hit very, very hard. The issue is that that’s the ONLY thing he’s good for. If he’s not using his Secret Skill, there is too much downtime where he isn’t doing anything at all.
That, combined with a counter buff that barely has any synergy in the game leaves this cool swordsman with much to be desired.
[Lord of Wisdom] Rimuru Tempest
Element: Water | Damage type: Magical | Secret Skill: Single-target
[Lord of Wisdom] Rimuru Tempest aka Raphael has the strongest DEF debuff in the game. Paired with someone like Velzard who makes debuffs even better and Raphael would become S tier. The issue is the investment involved. Plus, Raphael’s second skill is a seemingly negligible single Soul change, which suffers the same issue as [The Black Progenitor] Diablo.
[Steel Annihilator] Shion
Element: Dark | Damage type: Physical | Secret Skill: Multi-target
Your multi-target dark DPS, Shion is one of the few units in the game who can buff pierce rate and power. While it’s a great buff, she has the same issue with Hakurou in that you’ll rather spend your Skill points on Wind Milim or Space Rimuru’s buff instead. In addition, there is less synergy for pierce, as compared to ATK or DMG buffs from multiple characters that stack.
Note that her pierce buff doesn’t work as well with Octagram Milim, who already has her own pierce self-buff.
[Undefeated General] Benimaru
Element: Earth | Damage type: Physical | Secret Skill: Multi-target
Earth Benimaru is great on paper, but less desirable in practice. His biggest benefit is his low-cost Secret Skill damage and rate increase buff. It is easily stackable with another Secret Skill buff like Wind Milim’s, Veldora’s or Guy’s. The biggest problem is [Undefeated General] Benimaru‘s multi-target Secret Skill. You only want to have so many multi-target Secret Skill users on your team, and Benimaru is one too many.
Beyond that, the cost for his cheap Secret Skill buff is better spent elsewhere, like Gazel’s self-buff, for example.
[Harmonizer of Majin and Humans] Rimuru Tempest
Element: Water | Damage type: Magical | Secret Skill: Multi-target
Water Rimuru is the only character in the game who can reduce the enemy’s Soul of Secret gauge, effectively delaying the enemies’ ult by 1 or 2 turns. On top of that, he can also heal. While I’m sure some of you reading this may feel that Water Rimuru deserves to be placed higher on the tier list, hear me out.
While delaying an enemy’s ult can mean the difference between clearing or failing the mission, it’s simply not as synergistic of a strategy as stacking offensive buffs and finishing the enemy off. It also doesn’t happen often enough to make it as vital and when you do have a unit that’s in danger of dying to an ult, switching them out is the better, more cost-effective option. Treyni is higher due to how much more heals, plus she has a single-target nuke, as opposed to Water Rimuru’s multi-target ultimate.
[The Creator] Ramiris
Element: Wind | Damage type: Magical | Secret Skill: Multi-target
Considering how amazing her fellow Octagram partner is, Octagram Ramiris is a letdown. While she has the highest healing skill in the game, Treyni and Luminus are still better healers because of how ridiculously expensive the cost of her heal is. Sure, she can probably save your team from dying, but the SP is much better spent on powerful offensive buffs like Space Rimuru’s, New Year Milim’s or Wind Milim’s.
Combine that with a second skill that only increases the ATK of wind units (making her less relevant in other teams) and a less than desirable multi-target secret skill, and the only redeeming quality Ramiris has is that she is the tankiest character in the game.
[The Elegant Blood] Luminus Valentine
Element: Dark | Damage type: Magical | Secret Skill: Multi-target
Octagram Luminus heavily requires a team that’s built around her ability to increase the rate and damage of Soul of Combos. She’s amazing when you have specific units to convert Soul of Secrets and stack Secret Skill damage, but this usually results in a team that’s a bit too spread out in terms of element types.
[Captain of the Holy Knights] Hinata Sakaguchi
Element: Light | Damage type: Magical | Secret Skill: Single-target
As a Conquest boss, Hinata’s tankiness makes her a pain to deal with. As your party member, that tankiness is not as desirable. Sure, she can buff the team’s DEF by 35% for 1 turn, or change two different Souls into Soul of Secrets (like Luminus), but beyond that, you’ll mainly be relying on her single-target Secret Skill for your light team to complement Gazel’s incredible nuking power.
[The Platinum Devil] Leon Cromwell
Element: Light | Damage type: Magical | Secret Skill: Multi-target
Leon has the highest team ATK buff in the game. With Octagram Leon, Gazel, and Bride Shion forming a very strong, hard-hitting lineup, Leon can buff them to extreme heights.
The problem is that he has a multi-target Secret Skill. Beyond his buff, Leon is basically deadweight.
B Tier
You’ll still want these characters in teams of their respective elements, but their skills aren’t as useful as the other characters ranked higher in this Slime ISEKAI Memories tier list.
[Proud Giant Fist] Daggrull
Element: Light | Damage type: Physical | Secret Skill: Single-target
On paper, Daggrull is noticeably better than a lot of the other units in B tier. He possesses a genuinely useful and low-cost light resistance debuff. However, because there are so many light element units with greater impact, he’s just not as appealing an option compared to Gazel, the two Leons, Bride Shion and others.
[Conquerer of Flames] Shizue Izawa
Element: Fire | Damage type: Physical | Secret Skill: Single-target
With the release of so many stronger units, I’ve moved Shizu down to B tier. The only thing going for her is her Soul change which converts 2 Soul of Divine Protection into 2 Soul of Secrets and her single-target fire ultimate. There are other units now with more impact.
[Arch Golem] Beretta
Element: Dark | Damage type: Physical | Secret Skill: Single-target
Beretta is the dark team’s single target nuker. She’s basically Shizu, but for dark teams.
[Holy Princess] Shuna
Element: Light | Damage type: Magical | Secret Skill: Single-target
As a single-target nuker for light teams. [Holy Princess] Shuna can change your Soul of Secrets into Soul of Divine Protection. This is great for achieving higher DPS, but 9/10 times, Soul of Secrets is preferable as using ultimates are preferable to using Divine Protection.
[Date Night Beauty] Shizue Izawa
Element: Light | Damage type: Physical | Secret Skill: Multi-target
On paper, Valentine’s Shizu has two useful skills—a solid single-target heal and an ATK debuff, both of which are extremely cheap in cost. The problem is that she just has too low of an impact to be useful. There are other healers who can heal the entire team which is preferable over a single-target heal 9/10 times. Her ATK debuff also only lasts for one turn. Ultimately, you’ll want to spend your Skill Points on other characters whose skills provide greater impact in a fight.
[Spy in the Shadows] Souei
Element: Water | Damage type: Physical | Secret Skill: Single-target
Souei is the water team’s single-target DPS. Basically fills the same role as [Holy Princess] Shuna as he can change Soul of Secrets into Soul of Skills.
[Samurai General of Hellfire] Benimaru
Element: Fire | Damage type: Magical | Secret Skill: Multi-target
Benimaru is a great multi-target fire DPS. His buff lets him increase his own ATK which is great for finishing off multiple enemies. Sadly, there is not enough multi-enemy endgame content that is difficult enough to warrant Benimaru a higher placing in the tier list.
[Awakened Demon Lord] Rimuru Tempest
Element: Dark | Damage type: Magical | Secret Skill: Multi-target
Demon Lord Rimuru is an amazing dark-element magical unit with an incredible self-buff that increases both his crit rate and crit damage. He’ll easily rank higher on the tier list if his ultimate hits a single target, but because it is multi-target, he shares the same problem with [Samurai General of Hellfire] Benimaru.
[One of the Oldest Demon Lords] Milim Nava
Element: Earth | Damage type: Physical | Secret Skill: Multi-target
The earth team’s multi-target DPS, Earth Milim is vastly overshadowed by her Wind variant. She can change Soul of Secrets into Soul of Divine Protection while her other skill buffs the team DEF, making her basically a carbon copy of Souei.
[Manifestation of the Dragon] Milim Nava
Element: Dark | Damage type: Magical | Secret Skill: Single-target
A magical damage, dark character with a single target nuke, Dark Milim has the same soul change as her earth version, but with a worse second skill that raises her team’s critical resistance while also buffing her own critical rate.
[Tempest Star Wolf] Ranga
Element: Space | Damage type: Magical | Secret Skill: Multi-target
A multi-target space DPS, Ranga also features a Soul-changing skill, capable of changing Soul of Secrets into Soul of Skills. Unfortunately, his other skill, which buffs pierce rate, is rather underwhelming.
[Captain of the Goblin Riders] Gobta
Element: Fire | Damage type: Physical | Secret Skill: Single-target
Like most of the others on this tier, Gobta has a Soul Change and an okay-ish buff which enhances crit rate. If you have no other useful units to fill in for your fire team, [Captain of the Goblin Riders] Gobta is your man.
[The True Butler] Veldora Tempest
Element: Wind | Damage type: Physical | Secret Skill: Single-target
Butler Veldora has a Soul change and a pretty worthless buff that reduces enemy pierce power. His biggest saving grace is his high ATK and single-target Secret Skill.
C Tier
These characters have noticeably lower stats than the ones in the tiers above, or provide less impact.
[The Beginning] Guy Crimson
Element: Fire | Damage type: Magical | Secret Skill: Multi-target
Possessing the highest ATK in the game and a 100% stun, why would Octagram Guy rank so low in this Slime ISEKAI Memories tier list? The answer is simple: Stun-immune enemies.
Most of the hardest bosses and enemies in the game are Stun-immune, essentially making [The Beginning] Guy Crimson worthless in those fights. In most of the other in-game content, however, Guy is easily SS tier due to the consistency he provides with his stun. He certainly makes the game easier, but since this tier list takes into consideration the maximum potential of the units (especially in endgame content), Guy is deadweight.
[Bridegroom Slime] Rimuru Tempest
Element: Light | Damage type: Physical | Secret Skill: Single-target
Rimuru’s skills are far too niche and lack impact. The only time he’s rather viable is when he’s paired up with [Runaway Bride] Shion, and even then there’s better units to team her up with.
[Master of Maids] Rimuru Tempest
Element: Wind | Damage type: Physical | Secret Skill: Single-target
Maid Rimuru is an extremely defensive support character. The biggest issue is that his kit has no synergy whatsoever. He’s the only character who can increase Max HP, but it’s somewhat wasted as it requires a heal in order to make use of it. At least the same skill increases DEF for 3 turns.
His second skill increases guard power, but is also practically worthless without another character buffing guard rate. As it stands, he’s only useful for increasing your team’s DEF, a role that can be comfortably performed by Space Rimuru and other 4★ characters.
[Pink Ogre of Holy Light] Shuna
Element: Wind | Damage type: Magical | Secret Skill: Multi-target
Everyone gets [Pink Ogre of Holy Light] Shuna as a pre-registration reward. She has the lowest stats out of all the 5★ characters, but still makes a good pick for wind teams. She can change Soul of Divine Protection into Soul of Skills.
That is all for our Slime ISEKAI Memories tier list. To stay updated with the game, check out its Facebook page. You can also check out our:
- Slime ISEKAI Memories auto battle tier list
- Slime ISEKAI Memories wind event overview
- Slime ISEKAI Memories beginner guide
- Slime ISEKAI Memories reroll guide
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