
Koichi Hirose
Reverb Act 2
Part 4 — Diamond Is Unbreakable. A special specialist.
Tier by Copies Owned
| Role | ★1 | ★2 | ★3 | ★5 |
|---|---|---|---|---|
| Single-Target | A | A | A | A |
| AoE | S+ | S+ | S+ | S+ |
Based on combat simulation data, late-game phase. See the full tier list for this site's own Overall read.

Strengths
- Solid AoE damage — B grade
- Immobilizes the target
Weaknesses
- Limited to one role — tank only
Stats by Level
| Stat | Lv.20 | Lv.40 | Lv.60 | Lv.80 | Lv.100 |
|---|---|---|---|---|---|
| HP | 6,304 | 17,618 | 35,399 | 59,645 | 90,356 |
| Attack | 492 | 1,376 | 2,765 | 4,659 | 7,060 |
| Defense | 182 | 510 | 1,025 | 1,728 | 2,617 |
Other Stats
Bar length is relative to the highest known value for that stat across the current roster.
Skills
- SmackUltimate
Applies Onomatopoeia to 1 ally in front at deployment. If no ally is in front or the unit is defeated, targets the ally with the highest Attack. At the end of the duration, deals damage equal to 400% of Koichi Hirose's Attack to all enemies within the area of Onomatopoeia, and Immobilizes them for 3 seconds.
- Lv.2: Increases Onomatopoeia's damage per second to 220% of Attack and the final hit damage to 440% of Attack.
- Lv.3: Increases Onomatopoeia's damage per second to 240% of Attack and the final hit damage to 480% of Attack.
- Lv.4: Increases Onomatopoeia's damage per second to 260% of Attack and the final hit damage to 520% of Attack.
- OnomatopoeiaSkill
Deals damage equal to 120% of Attack to all enemies within 2 tiles around the target. Applies 1 "Smack" Onomatopoeia words within 2 tiles. Enemies entering the 2-tile area around Smack are Immobilized for 3 seconds. Smack expires after Immobilizing an enemy. Smack placement prioritizes the direction of the enemy closest to Koichi Hirose. Cooldown: 14 seconds.
- Lv.2: Reduces cooldown to 12 seconds. Increases damage to 160% of Attack.
- Lv.3: Reduces cooldown to 10 seconds. Increases damage to 200% of Attack.
- I Won't Forgive You!Passive 1Unlocks at ★2
Increases Attack and Max HP by 10%. Special Attack: Basic attacks from allies with Onomatopoeia have a 50% chance to deal additional damage equal to 60% of Koichi Hirose's Attack to all enemies within 1 tiles.
- Lv.2: Increases attribute bonuses to 15%, Onomatopoeia trigger chance to 55%, and additional damage to 80% of Koichi Hirose's Attack.
- Lv.3: Increases attribute bonuses to 20%, Onomatopoeia trigger chance to 60%, and additional damage to 100% of Koichi Hirose's Attack.
- Reverb ACT 2Passive 2Unlocks at ★3
Ultimate grants 2 stacks of Effect Hit Up to the target ally. When an ally with Onomatopoeia is defeated, immediately triggers Onomatopoeia, dealing damage equal to 440% of Koichi Hirose's Attack to all enemies within 2 tiles.
- Lv.2: Increases damage to 480% of Attack.
- Lv.3: Increases damage to 520% of Attack.
- Body-Penetrating SoundPassive 3Unlocks at ★5
When Onomatopoeia deals damage, has a 10% base chance to inflict 1 stack of Attack Down and Spirit Influence to the target hit.
- Lv.2: Increases trigger chance to 20%.
- Lv.3: Increases trigger chance to 30%.
Recommended Loadout
A recommended gear loadout for this character.

