Iroi Build Guide collects build notes, tier position, skills, stats, teams, and related Neverness to Everness guides.
Iroi
Member of CSU-2
S-Rank
Anima
Liquid
For those who meet her first, she's warm and friendly, easy to trust, and approachable. All of her deliberate acts line up perfectly with what people expect from a "normal girl." Everything is...
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Tier Position
K
Tier
T0
Analysis
The game's first limited dedicated healer. Her passive turns every heal into a team-wide Defense Ignore buff, and any ally who would be knocked out instead enters Regression until her ultimate revives them, removing survival as a bottleneck for aggressive, offense-first team comps.
Pros
4
Any ally reduced to 0 HP enters Regression instead of falling, and her ultimate can revive them outright — the most forgiving safety net of any sustain unit
Every heal grants the whole team a Defense Ignore buff, converting her sustain output directly into team damage
Ultimate branches on banked Imagination: low Imagination opens continuous team healing, high Imagination opens a damage window with a guaranteed revive
Scales purely on ATK, so her own stat investment doubles as team-wide offensive support instead of competing with DPS resources
Cons
3
Rigid rotation — top performance requires holding her Skill's Regression on the main carry consistently, adding a tracking task on top of piloting the DPS
Signature arc (The Wrong Gate) is a meaningful damage/utility step up over generic 5-star options, pushing full value toward heavier investment
Her ultimate can only revive one Regression-state ally per cast, so if several teammates go down at once the rest stay benched in Regression until the next dream window
Recommended Build
Role: Support / Healer
Iroi is built to slot into an offense-first team without the opportunity cost of a normal healer: healing is her only defensive tool, and Sympathetic Nerves turns it into a team-wide DEF Ignore buff on top of the heal itself. The Wrong Gate is best-in-slot with no real competition — it raises her own Anima DMG by up to 30% and all allies' DMG by 15% on every heal, converting the healing she already does constantly into a full team damage buff. Speedy Hedgehog's 4-piece stacks another 15% team ATK for 20s after her Ultimate, and its Charge Efficiency keeps that Ultimate online for revives. Because she scales on ATK — her team ATK buff, sheep attacks, and console bonus all key off it — ATK% and flat ATK take priority over Healing Bonus, with Anima DMG% and Energy Regen as secondary considerations; HP, DEF, and Healing Bonus are only worth building if the team needs more sustain than her base kit already provides. The core habit is keeping Regression on the main carry as consistently as possible, since it is both her survival tool and the setup for her Ultimate's revive.
Carries the Lakshana overflow burst shell. Iroi's Regression safety net lets her run a fully offense-first lineup without spending a slot on a plain healer.
Covers the carry's survival through Regression instead of a traditional heal-only slot. Every heal also grants the team a DEF Ignore buff, converting her sustain directly into team damage.
Increases ATK by 16%.
When the wearer performs healing, increases the wearer's Anima DMG dealt by 30% and all allies' DMG dealt by 15% for 20s. Resets the duration when triggered again. Effects with the same name do not stack.
Alt
Youthful Fantasy
"Black Tome"
5★
Increases Break Intensity by 60.
Seals Arc: Black Tome with two chains by default. Unleashes 1 chain each time any character on the team casts a Support Skill. Makes Arc: Black Tome available when all two chains are unleashed.
Arc: Black Tome — Summons the Black Tome for 20s. Designates an enemy every 5s. Increases the wearer's Chaos DMG dealt to designated enemies by 20%. Deals Chaos DMG equal to 200% of the wearer's ATK to designated enemies when they take Break Damage.
Legendary (4): Increases wearer's CRIT DMG by 8% when a nearby enemy takes Anima DMG from the Team, up to 7 stacks. Each stack lasts 10s. Effect remains active when the character is off-field.
Key Esper Reactions
BlossomDuo Cycle
Cosmos
Anima
Generates 1 Vita Bud near the target after triggering Esper Cycle, which blossoms 5 Vita Pistils. Vita Pistils then fly toward targets within range, exploding every 2s and dealing DMG to an area. Up to 3 Vita Buds can exist on the field at once.
Blossom Enhancement: Generates a Vita Bud Copy when the current Vita Bud has existed for 3s. This copy cannot duplicate and does not count toward the Vita Bud limit. The copy produces 20 Copied Vita Pistils. Every 0.5s, one Copied Vita Pistil flies toward a target within range and explodes, dealing 37.5% of the original Vita Pistil's DMG.
About
For those who meet her first, she's warm and friendly, easy to trust, and approachable.
All of her deliberate acts line up perfectly with what people expect from a "normal girl."
Everything is alright. This is working.
Character Info
Rarity
S-Rank
Element
Anima
Esper Type
Liquid
Stats
HP1,136
ATK38
DEF60
Awakening
Iterated Prisoner's Dilemma
A1
Restores 3 Imagination per second while Iroi is off-field. Increases Imagination gain by 30% and grants Iroi maximum Imagination upon entering battle.
Strategy: Tit for Tat
A2
Summons Morpheus, Icelos, or Phantasos at random when any ally casts a skill, performing 1 assist attack that deals DMG equal to 200% of Iroi's ATK. Restores all team members' HP by 120% of Iroi's ATK. Cooldown: 5s.
Trait: Cooperative
A3
Increases Iroi's healing effects by 36%.
Trait: Retaliatory
A4
Increases the ATK Ratio of lambs that replace allies in the Regression state: Morpheus: Sweet Dreams: up by 30% Deep Slumber: up by 30%.
Icelos: Little Prick: up by 30% Double Dose: up by 30%.
Phantasos: Lullaby Time: up by 30% Off-Key: up by 30%.
Trait: Transparent
A5
Additional Sympathetic Nerves Effect: Increases all team members' ATK by 15% of Iroi's Base ATK for 20s.
Trait: Forgiving
A6
Grants 100% HP, 50 Cycle Energy, and 50 Ultimate Energy to the character revived after Iroi casts 3.8-Billion-Year Mirage.
Resonance
Primate Among All Things
R1
Increases the skill level of Collaboration, Future Self Continuity, and 3.8-Billion-Year Mirage by 1. Increases all team members' DEF by 30% while Iroi is on the team.
Self-Proclaimed Crown of Creation
R2
Increases all team members' Crit DMG by 25% while Iroi is on the team. Increases Iroi's DMG dealt by 15% and Crit Rate by 5% for each ally in the Regression state.
Increases Crit Rate by 16%. Increases Redirect Skill DMG by 7% for 5s after the wearer's Basic Attack deals DMG. Stacks up to 4 times and can gain at most 1 stack every 0.3s. Increases Basic Attack DMG by 28% for 15s after the wearer casts a Redirect Skill. Increases the wearer's Lakshana DMG by 16% while both effects are active.
Increases ATK by 14%. Grants 1 stack of Chaos Thorn each time the wearer deals DoT. Increases CRIT DMG by 6% per stack for 3s. Triggers at most once every 0.3s, up to 10 stacks, and refreshes the duration when retriggered. Grants 10 stacks of Chaos Thorn immediately when the wearer casts a Redirect Skill. Extends the Broken state of a Broken enemy by 3s when the wearer deals damage to them (triggers at most once per Break Effect).
Increases ATK by 16%. When the wearer performs healing, increases the wearer's Anima DMG dealt by 30% and all allies' DMG dealt by 15% for 20s. Resets the duration when triggered again. Effects with the same name do not stack.
Increases Break Intensity by 60. Seals Arc: Black Tome with two chains by default. Unleashes 1 chain each time any character on the team casts a Support Skill. Makes Arc: Black Tome available when all two chains are unleashed. Arc: Black Tome — Summons the Black Tome for 20s. Designates an enemy every 5s. Increases the wearer's Chaos DMG dealt to designated enemies by 20%. Deals Chaos DMG equal to 200% of the wearer's ATK to designated enemies when they take Break Damage.
Summons lambs to perform up to 5 consecutive attacks, dealing Anima DMG. Builds up Imagination when attacks hit.
Basic Attack: Daydream
Hold Basic Attack to charge up, consuming Imagination based on the charge duration to unleash up to 3 instances of Daydream, dealing Anima DMG. Hold Basic Attack during Reflexive Response, Bang!, Future Self Continuity, and 3.8-Billion-Year Mirage, consuming Imagination to unleash the 3rd instance of Daydream, dealing Anima DMG.
Basic Attack: Lucid Dream
Hold Basic Attack again after Iroi uses Basic Attack: Daydream to consume Imagination, summoning Morpheus to unleash sustained fire that deals Anima DMG.
Basic Attack: Wakey-Wakey
Press Basic Attack while airborne to plunge, dealing 1 instance of Anima DMG to an area upon impact. Increases DMG based on fall height by up to 100%. Builds up Imagination on hit.
Reflexive Response
Triggers when using Basic Attack: Collaboration after a Critical Dodge. Throws Morpheus at the target, dealing 1 instance of Anima DMG and reducing Break. Builds up Imagination on hit.
Scaling
Lv.13
Collaboration: 1st Instance DMG Ratio & Builds up Imagination
191.4%, 2
Collaboration: 2nd Instance DMG Ratio & Builds up Imagination
40% *3, 3
Collaboration: 3rd Instance DMG Ratio & Builds up Imagination
25.9% *8, 3
Collaboration: 4th Instance DMG Ratio & Builds up Imagination
176.8%, 4
Collaboration: 5th Instance DMG Ratio & Builds up Imagination
65% *3, 8
Cycle Energy
36
Plunge DMG Ratio & Builds up Imagination
90.7%, 2
Daydream: 1st Instance DMG Ratio
92.7% *3
Daydream: 2nd Instance DMG Ratio
222.6%
Daydream: 3rd Instance DMG Ratio
100.2%
Lucid Dream: DMG Ratio & Imagination Cost
59.7% *35, 10
Critical Riposte Ratio & Builds up Imagination
337.4%, 4
Upgrade Costs
Total (Lv.1 → Lv.10)
437,000
Lv.2
Asc.2+
2000
Lv.3
Asc.3+
5000
Lv.4
Asc.3+
10000
Lv.5
Asc.4+
20000
Lv.6
Asc.4+
40000
Lv.7
Asc.5+
60000
Lv.8
Asc.5+
80000
Lv.9
Asc.6+
100000
Lv.10
Asc.6+
120000
…Bzz—bzz bzz—bzz bzz bzz…
Future Self ContinuitySkill
Anima
Self-Identity Extension Press to activate. Heals all team members, grants them an ATK bonus, deals Anima DMG, pulls enemies in, and builds up Imagination.
Future Self Continuity Hold to activate. While in combat, causes 3 allies to enter the Regression state and assist in battle.
Passive: Fallen allies enter the Regression state while Iroi is on the team and in combat. Builds up Imagination when any fallen ally enters the Regression state.
Self-Identity Extension
Press to activate. Summons lambs to heal all team members once and grant them an ATK bonus based on Iroi’s Base ATK. Summons three lambs to attack respectively, dealing Anima DMG and pulling in nearby enemies. Using this skill builds up Imagination.
Scaling
Lv.13
Redirect Skill: Three Lambs' Attack Ratio
377.7% + 45.1% *7 + 314.8%
Bonus Ratio Based on Iroi's Base ATK
0.2%
ATK Bonus Duration
20s
Healing Ratio
0.9%
Regression: Morpheus - Sweet Dreams Base ATK Ratio
139.8%
Regression: Morpheus - Deep Slumber Base ATK Ratio
104.8% *5
Regression: Icelos - Little Prick Base ATK Ratio
224.6%
Regression: Icelos - Double Dose Base ATK Ratio
449.2%
Regression: Phantasos - Lullaby Time Base ATK Ratio
237.2%
Regression: Phantasos - Off-Key Base ATK Ratio
474.4%
Regression: Lambs' Support Skill Ratio
503.6%
Upgrade Costs
Total (Lv.1 → Lv.10)
437,000
Lv.2
Asc.2+
2000
Lv.3
Asc.3+
5000
Lv.4
Asc.3+
10000
Lv.5
Asc.4+
20000
Lv.6
Asc.4+
40000
Lv.7
Asc.5+
60000
Lv.8
Asc.5+
80000
Lv.9
Asc.6+
100000
Lv.10
Asc.6+
120000
Hold to activate. Creates dreamlike illusions during battle, causing 3 allies to enter the Regression state and assist in battle. Regression is automatically removed after leaving combat.
3.8-Billion-Year MirageUltimate
Anima
Opens a dream and triggers different effects based on the amount of Imagination built up. Below threshold: Continuously heals all allies. At threshold: Deals continuous Anima DMG. Switching to a character in Regression state during the dream revives that character and restores some portion of their HP. The dream ends when Imagination is depleted. The revived character then returns to Regression. While the dream is active, Imagination cannot be built up, but casting Daydream and Lucid Dream do not consume Imagination.
Return to the first dream. Opens the gate to a dream and triggers different effects based on the amount of Imagination built up. If Imagination has not reached the required threshold: Iroi opens the Dream of the Horned Gate, continuously healing all allies. If Imagination has reached the required threshold: Iroi opens the Dream of the Ivory Gate, continuously healing all allies and dealing Anima DMG to enemies inside the dream. During this time, press and hold the avatar of a team member in the Regression state to temporarily revive them and restore a portion of their HP. This effect can revive up to 1 character during each dream. The dream continuously consumes Imagination. When Imagination is depleted, the dream ends, and the revived character returns to the Regression state. While the dream is active, Imagination cannot be built up, but casting Daydream and Lucid Dream do not consume Imagination.
Scaling
Lv.13
Post-Cast Healing Ratio
1.4%
Continuous Healing Ratio
0.3%
Post-Cast DMG Ratio
755.5%
DoT Ratio
63%
Upgrade Costs
Total (Lv.1 → Lv.10)
437,000
Lv.2
Asc.2+
2000
Lv.3
Asc.3+
5000
Lv.4
Asc.3+
10000
Lv.5
Asc.4+
20000
Lv.6
Asc.4+
40000
Lv.7
Asc.5+
60000
Lv.8
Asc.5+
80000
Lv.9
Asc.6+
100000
Lv.10
Asc.6+
120000
I heard the bell at both ends of the dream: once at the beginning, once at the end. But the bell only rang once. From hydrothermal vents in the deep sea to skyscrapers on land, that awful chime has followed everything. Oh my, it's been ringing for 3.8 billion years.
Bang!Chain Skill
Anima
Deals Anima DMG and heals all team members, building up Imagination.
Just in time! Picks up Morpheus and strikes forward, dealing 1 instance of Anima DMG, healing all team members, and building up Imagination.
Scaling
Lv.13
DMG Ratio
503.6%
Healing Ratio
0.6%
Upgrade Costs
Total (Lv.1 → Lv.10)
437,000
Lv.2
Asc.2+
2000
Lv.3
Asc.3+
5000
Lv.4
Asc.3+
10000
Lv.5
Asc.4+
20000
Lv.6
Asc.4+
40000
Lv.7
Asc.5+
60000
Lv.8
Asc.5+
80000
Lv.9
Asc.6+
100000
Lv.10
Asc.6+
120000
Would you believe me if I said this is the sound of the Big Bang?
Mirror ImagePassive
Blossom Enhancement: Generates a Vita Bud Copy when the current Vita Bud has existed for 3s. This copy cannot duplicate and does not count toward the Vita Bud limit. The copy produces 20 Copied Vita Pistils. Every 0.5s, one Copied Vita Pistil flies toward a target within range and explodes, dealing 37.5% of the original Vita Pistil's DMG.
Sometimes, my shadow gets there before I do.
Sympathetic NervesPassive
Grants all team members an additional 5% DEF Ignore for 20s when performing healing.
My body lives on faithfully, covered in scars and never saying a word.
Console
Slot Layout
20 total slots
Specialization
Type III
Increases ATK by 10% for each Type III Module equipped.
3.8-Billion-Year Mirage
Future Self Continuity
Bang!
Collaboration
Best
The Wrong Gate
Reverie Gate
5★
Alt
Youthful Fantasy
"Black Tome"
5★
Best
Speedy Hedgehog
5★
5★
Cosmos
Anima
25000
