Iroi is the first limited-time support NTE has released, and she does two jobs at once. She keeps the team alive with heals, shields, and a revive on her Ultimate, and she pumps up everyone’s damage while she does it. That mix is why she slots into almost any roster in version 1.2. The build itself is refreshingly simple once you accept one thing: despite being a healer, she wants attack stats, not defensive ones.
Quick answer: Equip The Wrong Gate Arc, run the Speedy Hedgehog module set, build ATK% / ATK with some crit, level her Ultimate first, and place her behind a Shinku hypercarry core with Hathor.
Best Arcs for Iroi
Her signature Arc, The Wrong Gate, is the clear best-in-slot and the reason she scales off attack. It carries a big chunk of Base ATK plus a 30% ATK substat, and its passive turns every heal into a team-wide damage buff. Whenever Iroi heals, her own Anima damage jumps (up to 60%) and the rest of the squad gains an all-damage bonus for 20 seconds that refreshes each time she heals again. Since her entire kit revolves around healing, that buff is basically always on.
| Arc | Rank / Source | Why it works |
|---|---|---|
| The Wrong Gate | S · Signature | BiS. High Base ATK plus 30% ATK substat, and heals grant a refreshing team all-damage buff. |
| Fluff of Fleetness | S · Battle Pass | Best if you lean her toward sub-DPS. Stacks ATK while on-field and comes with a Crit DMG substat. |
| Mind Royale | S · Alternative | Utility pick. Grants Ultimate Energy on Redirect Skill for faster Ultimate rotations. |
| Youthful Fantasy | S · Alternative | Same ATK% substat as her signature when you don’t own The Wrong Gate. |
| Clear Skies | A · F2P | Accessible option that boosts Anima damage from her Redirect Skill and Ultimate. |
If you take Fluff of Fleetness for a damage-focused setup, drop Healing Bonus in favor of crit and keep her on the field to hold her ATK stacks. For a pure support, any Arc that stacks Base ATK or Ultimate Energy keeps her rotation online.
Best Cartridge and Modules
Speedy Hedgehog is the set to build. Its 2-piece adds Charge Efficiency so her Ultimate comes back faster, and its 4-piece hands the whole team a 15% ATK boost for 20 seconds after every Ultimate cast. That pairs perfectly with The Wrong Gate, because a support who cycles her Ultimate quickly is also refreshing both damage buffs constantly.
There is a hidden payoff here too. Iroi gains 10% ATK for each Type III Module she runs. Speedy Hedgehog uses four Type III slots, so the set alone feeds her 40% ATK, and filling the remaining two slots with Type III modules pushes that to 60%.
| Set | Bonus | Use case |
|---|---|---|
| Speedy Hedgehog | 2pc Charge Efficiency +12%; 4pc all allies +15% ATK for 20s after Ultimate (no stack) | BiS support. Faster Ultimate uptime and a team ATK buff. |
| Fireflies and the Forest | 2pc Anima DMG +10%; 4pc stacking Crit DMG when enemies take team Anima DMG | Alternative for a DPS-leaning Iroi built around crit. |
Stat priority
Build her as an attack support first. Prioritize ATK% and ATK so her buffs and personal Anima damage both scale, then add enough Cycle Intensity to keep her healing and Ultimate loop running. If you commit to the crit variant with Fireflies and the Forest, swap in Crit Rate and Crit DMG as the main stats instead.
| Slot | Main stat (support) |
|---|---|
| Slot 1 | ATK% |
| Slot 2 | ATK (or Healing Bonus) |
| Slot 3 | Crit Rate |
| Slot 4 | Crit DMG |
Substat order: ATK% > ATK > Crit Rate > Cycle Intensity. Cycle Intensity matters most in longer fights where you need her Ultimate ready for an emergency revive.
Skill upgrade priority
Her Ultimate drives both her healing and her revive mechanic, so it gets levels first. Her Redirect Skill comes next since the tap version heals, groups enemies, and grants a team ATK boost. Basic Attack and the Support Skill are last, and if you only ever run her as a pure buffer, upgrading them barely moves her value.
- Ultimate
- Redirect Skill
- QTE / Support Skill
- Basic Attack
Awakening priority
If you are pushing her as a buffer, A5 is the standout node because it adds a team-wide ATK boost scaled off Iroi’s Base ATK. A2 is the next big breakpoint, turning her into a passive off-field damage source that fires an assist attack whenever an ally casts a skill. A1 improves her Imagination generation. Save A3 and A6, the healing and revive nodes, for when survival pressure is high.
| Node | Effect | Priority |
|---|---|---|
| A5 — Transparent | Adds a team ATK buff based on Iroi’s Base ATK | 1 |
| A2 — Tit for Tat | Summons a lamb to assist-attack when an ally casts a skill | 2 |
| A1 — Prisoner’s Dilemma | Boosts Imagination gain and regenerates it off-field | 3 |
| A4 — Retaliatory | Raises ATK ratio for allies in Regression | 3 |
| A3 — Cooperative | Increases healing on low-HP allies | 4 |
| A6 — Forgiving | Grants HP and energy to revived allies | 4 |
Best teams for Iroi
Iroi’s home is the Shinku hypercarry core. Shinku plays aggressively and takes hits, and Iroi’s Regression state means a mistimed dodge no longer ends the run. Her heals trigger the team damage buff, Speedy Hedgehog adds the ATK boost, and Hathor extends the burst window. She replaces Nanally as the sustain slot in the strongest Shinku setups.
| Team | Lineup | Role of Iroi |
|---|---|---|
| Shinku Hypercarry | Shinku + Iroi + Hathor + Chaos / Zero / Chiz | Heals to trigger the team damage buff and covers Shinku’s aggressive playstyle with Regression. |
| Anima / Blossom Burst | Nanally + Zero + Hotori + Iroi | Her duplicate Vita Bud passive extends Blossom uptime while she buffs Anima carries. |
| F2P flex | Any DPS + Iroi + Jiuyuan + Zero | Universal sustain and buffs that work across elements for daily and early content. |
You know the buffs are live when the Reverie Gate effect from The Wrong Gate appears after a heal and Speedy Hedgehog’s ATK icon shows on the team after each Ultimate. If those buffs are missing, you either skipped a heal in the rotation or your Ultimate hasn’t fired yet.
Ascension materials
Taking Iroi from Lv.20 to Lv.80 costs 525,000 Beetle Coins plus a stack of Silhouettes and her signature material. Start farming Silhouettes and Dreamless Seeds early, since those are usually the bottleneck for a limited unit.
| Material | Amount |
|---|---|
| Beetle Coins (ascension) | 525,000 |
| A Page from Delusion’s Shore | 86 |
| Blurred Silhouette | 18 |
| Fading Silhouette | 17 |
| Chaos Silhouette | 15 |
Built this way, Iroi turns into a near-universal support. The Wrong Gate and Speedy Hedgehog stack ATK buffs, a damage bonus, and a DEF Ignore effect on top of her healing and revives, so she keeps a team alive and hitting harder at the same time. Pair her with Shinku, manage her Imagination for the right Ultimate, and use Regression before big attacks rather than as a panic button.
