Iroi
"Sheep Summoner"
Overview
Updated: Jul 29, 2026Iroi is an S-Rank Anima Support in Version 1.2 Phase 2. Her three sheep (Morpheus, Icelos, Phantasos) provide healing and buffs, while her signature Regression mechanic prevents any character from dying — instead entering an invincible state where the sheep fight in their place.
Skills
Basic Attack
Ranged Anima DMG attacks.
Skill: Summon Sheep
Deploys a sheep summon onto the field. Up to 3 sheep can be active simultaneously.
Ultimate: Flock Gathering
Enhances active sheep summons and provides team-wide benefits based on the number of active sheep.
Healing Fleece
Active sheep periodically heal the on-field character. Healing amount scales with Iroi's Max HP.
Woolen Blessing
Active sheep provide ATK and CRIT DMG buffs to nearby allies.
Overview
Iroi is an S-Rank Anima Support character from the Containment Strike Unit Division 2 (C.S.U.2), released in Version 1.2 Phase 2 on July 29, 2026. She brings a unique summon-based playstyle with three named sheep — Morpheus, Icelos, and Phantasos — providing healing, buffs, and her signature Regression mechanic that makes the entire team effectively unkillable.
Key Mechanics
The Sheep Summons
Iroi’s entire kit revolves around her ability to deploy and manage up to 3 independent sheep summons on the battlefield.
- Three Named Sheep: Morpheus, Icelos, and Phantasos each have distinct roles — healing, buffing, and providing Regression coverage respectively.
- Sustain (HP Scaling): Active sheep periodically heal the on-field character. Healing scales off Iroi’s Max HP, making her easy to build.
- Offensive Buffs: Sheep project auras granting ATK and CRIT DMG buffs to nearby allies.
- Regression (Signature Mechanic): When any character’s HP reaches 0, instead of dying they enter Regression state — becoming temporarily invincible while the sheep fight in their place. This effectively gives the entire team a death-prevention mechanic.
Best Build (Preview)
Arc (Weapon)
As an HP-scaling healer and buffer, Iroi will prioritize Arcs that boost Max HP, Energy Regeneration, or provide team-wide utility.
| Priority | Arc | Why |
|---|---|---|
| BiS | The Wrong Gate (Signature) | Boosts HP%, Energy Regen, and enhances Regression duration and healing output. |
| Alt | HP% / Energy Regen Arcs | Focus on keeping her Ultimate available and maximizing her healing output. |
Stat Priority
Since her healing scales with HP, building Iroi will be straightforward.
| Slot | Main Stat | Sub-Stats |
|---|---|---|
| Module 1 | HP% | HP% > Energy Regen > Flat HP |
| Module 2 | HP% | HP% > Energy Regen > Flat HP |
| Module 3 | Healing Bonus / HP% | HP% > Energy Regen > Flat HP |
Best Teams (Preview)
The C.S.U.2 Core
| Slot | Character | Element | Role |
|---|---|---|---|
| Main DPS | Shinku | Cosmos | Frenzy Burst Carry |
| Support | Iroi | Anima | Healing + Buffs |
| Sub DPS | Mint | Cosmos | Downtime DPS + Blossom Synergy |
| Flex | Any | Any | Reaction Enabler / Utility |
Iroi is tailor-made to support aggressive, frontline DPS characters like Shinku. Shinku’s Frenzy state requires her to stay in the thick of combat, making Iroi’s continuous, off-field healing from the sheep summons invaluable. Furthermore, the ATK and CRIT DMG buffs provided by the sheep directly amplify Shinku’s massive burst damage.
Universal Support
Because Iroi provides both healing and universal offensive buffs (ATK/CRIT DMG), she will likely be a highly versatile support unit capable of slotting into almost any team composition that needs sustain, similar to how premium healers function in other gacha games.
Related Resources
- Iroi Character Preview & Healer Guide — Deep dive into her leaked mechanics.
- NTE 1.2 Pull Guide: Shinku vs Iroi — Advice on resource management for the upcoming banners.
Iroi Guides & Resources
999 Nights Guide: Warren Continent, Classes, Gear & Tips
Complete guide to the 999 Nights permanent game mode in NTE 1.2. Learn how the class system works, how to appraise gear,...
999 Nights Guide: Warren Continent, Classes, Gear & Tips
Iroi Best Team Comps Guide: Top Teams for 1.2
Shinku Best Team Comps Guide: Top Teams for 1.2
Shinku Build Guide: Best Arcs, Modules, Teams & Mechanics
Best Teammates for Iroi
See all team compositions or check the tier list for current meta rankings.
Community Rating
How would you rate Iroi overall?
Votes are stored locally in your browser. One vote per character.