Theorylytics
Sunna
PhysicalSupportAngels of Delusion★★★★★ S-Rank

Sunna

Published Jul 19, 2026 · Updated v3.0
Content Ratings
Shiyu DefenseA
Deadly AssaultA
Hollow ZeroB
Should You Pull?YES

Sunna provides exceptional team-wide ATK and DMG buffs while enabling unique off-field damage triggers via her Cat's Gaze mechanic. She is a premier support choice for high-end Physical and Anomaly-based squads looking to maximize burst output.

Sunna is a versatile support agent who utilizes her sidekick, Bubblegum, to apply the Cat's Gaze debuff to enemies. Her mechanics focus on team-wide ATK scaling and orchestrating coordinated attacks that trigger massive, guaranteed CRIT damage from active teammates. By managing Claw Sharpener stacks and activating her Ether Veil, she provides sustained offensive pressure and significant utility.

Physical SupportOff-field DMGATK BuffDebuff EnablerCoordinationAnomaly SynergyBurst Support

Overview

Quick Build

W-Engine

Thoughtbop

S-rank — Energy Regen, best in slot

Disk Set

Moonlight Lullaby (4-PC)

4-PC · Best in slot

Disk 4

CRIT Rate%

Main stat

Disk 5

Physical DMG%

Main stat

Disk 6

ATK%

Substats

CRIT Rate >= CRIT DMG = ATK%

Strengths

  • Provides substantial ATK buffs up to 525 based on initial stats
  • Cat's Gaze allows for powerful off-field coordinated attacks
  • High invulnerability frames on multiple skill animations
  • Simplifies combo rotations for Anomaly and Attack agents
  • Team-wide DMG amplification via Ultimate

Weaknesses

  • Requires careful management of Claw Sharpener stacks for optimal output
  • Buff uptime depends on maintaining Ether Veil or EX skills
  • Cat's Gaze only triggers on the primary target, limiting multi-target burst
  • Heavy dependency on high base ATK for maximum buff scaling
  • Support role may be overshadowed if power creep favors pure DPS

Skill Priority

1
Basic AttackHighest

Primary damage source.

2
Special AttackHigh

EX delivers strong damage.

3
Chain AttackMedium

Chain burst.

4
Core PassiveMedium

Passive enhancement.

5
DodgeLow

Negligible.

Stat Priority

1
CRIT Rate75–80%
2
CRIT DMG150–200%
3
ATK2500+
4
Anomaly Proficiency120+
5
HP10000+
6
PEN RatioAs available
Rotation Priority
Physical/Attack Focus

Open with EX Special to establish Ether Veil and apply Cat's Gaze before swapping to your main DPS.

Sunna EX Special
Anomaly Focus

Ensure Cat's Gaze is active to allow your Anomaly agent to trigger the higher 240% ATK damage multiplier.

Sunna Basic/Special

Review and adjust rotations based on your specific team composition.

W-Engines

S-Rank W-Engines

1
Thoughtbop

Energy Regen

While not the active character, the equipper's Energy Regen increases by 0.6/0.69/0.78/0.87/0.96 per second. When the equipper uses an EX Special Attack and deals Physical DMG, all squad members gain a buff: DMG dealt increases by 12.5/14.3/16.1/17.9/20% for 40s, stacking up to 2 times. Repeated triggers reset the duration. At 2 stacks, characters gain an additional 10/11.5/13/14.5/16% ATK. Only one instance of this effect can exist in the same squad.

Why it works —Best-in-slot for maximizing squad DMG buffs and consistent energy regeneration.

2
Weeping Cradle

Energy Regen

While off-field, Energy Regen increases by 0.6/0.75/0.9/1.05/1.2 per second. Attacks from the equipper enhance the squad's DMG against a struck target by 10/12.5/15/17.5/20% for 3 seconds. During this period, this effect is further increased by 1.7/2/2.5/3/3.3% every 0.5s, up to a maximum additional increase of 10.2/12/15/18/19.8%. Repeated triggers only refresh its duration without refreshing the DMG increase effect. Passive effects of the same name do not stack.

Why it works —Viable but requires active play and specific timing to maximize DMG increase.

A-Rank W-Engines

3
Kaboom the Cannon

Energy Regen

When any friendly unit in the squad attacks and hits an enemy, all friendly units' ATK increases by 2.5/2.8/3.2/3.6/4% for 8s, stacking up to 4 times. The duration of each stack is calculated separately, and each friendly unit can provide 1 stack of the buff. Passive effects of the same name do not stack.

Why it works —Strongest F2P option due to reliable ATK stacking triggered by team attacks.

4
Unfettered Game Ball

CRIT Rate

Whenever the equipper's attack triggers an Attribute Counter effect, all squad members' CRIT Rate against the struck enemy increases by 12/13.5/15.5/17.5/20% for 12s. The bonuses triggered by the same type of passive effects do not stack.

Disk Drives

Moonlight Lullaby (4-PC)
SMoonlight Lullaby (4-PC)Best in Slot
4PCWhen the equipper is a Support character and uses an EX Special Attack or Ultimate, the DMG dealt by all squad members increases by 18% for 25s. Repeated triggers reset the duration. Passive effects of the same name do not stack.
2PCPair with: Swing Jazz, Astral Voice, Hormone Punk.
Optimizes support potential by reinforcing her role as the primary team enabler.

Disk 4

CRIT Rate%

Disk 5

Physical DMG%

Disk 6

ATK%

Team Compositions

Sunna

Sunna

Support

Ye Shunguang

Ye Shunguang

Attack

Zhao

Zhao

Defense

High-usage endgame shell featuring Sunna, Ye Shunguang, Zhao. Built around Sunna's Support role with teammates covering stun, buffs, or secondary damage.

Agent Synergy
Sunna
SunnaSupport

Primary Support — owns the damage / utility identity of this squad.

Ye Shunguang
Ye ShunguangAttack

Attack partner who covers gaps while Sunna handles the main role.

Zhao
ZhaoDefense

Defensive utility and supportive buffs that keep Sunna's rotation stable.

Skills & Mindscapes

Skills

Core PassiveCuteness Is Justice

Characters in the [Angelic Chord-ination] state gain increased ATK, equal to 30% of Sunna's initial ATK, up to a maximum of 525 ATK. When Sunna's initial ATK reaches 1,750, the ATK buff granted to all squad members reaches its maximum. When attacks from [Basic Attack: Naughty Cat Spotted], [EX Special Attack: Bubblegum Barrage], [EX Special Attack: Special Photography Technique], [Chain Attack: Don't Mess With the Cat], or [Ultimate: Smash It All!] hit an enemy, apply [Cat's Gaze] to the target for 12s. While Sunna is the on-field character, the duration of [Cat's Gaze] is continuously refreshed. Some normal enemies affected by [Cat's Gaze] show reduced aggression toward Sunna. When [Attack] or [Anomaly] characters in the squad continuously land attacks on enemies affected by [Cat's Gaze], [Cat's Gaze] is triggered and removed: When triggered by an [Attack] character, deals the Agent's Attribute DMG equal to 150% of ATK to enemies in an area. When triggered by an [Anomaly] character, deals the Agent's Attribute DMG equal to 240% of ATK to enemies in an area. This DMG is guaranteed to CRIT, and the CRIT DMG is increased by 80%. DMG dealt by [Cat's Gaze] is treated as DMG dealt by the [triggering Agent]. When multiple enemies on the field have [Cat's Gaze], only the primary attack target's [Cat's Gaze] is triggered. Upon triggering, [Cat's Gaze] is removed from all enemies on the field. When an enemy is Stunned, the number of attacks required to trigger [Cat's Gaze] is significantly reduced. BASE ATK: 0

Additional AbilityDaydreamer's Counterpoint

When another character in your squad is an Attack character or shares the same Faction: When characters inside Ether Veil: Delusion Reprise land attacks on enemies, the target's Stun DMG Multiplier increases by 30% for 40s. When Sunna enters the battlefield, she gains 15 Energy. In Investigation Zone mode, the effect can trigger once every 180s.

Basic AttackMischief Meteor Hammer

Unleashes up to four attacks ahead, dealing Physical DMG.

Basic AttackNaughty Cat Spotted

During combat, when Sunna is off-field and there are no enemies with Cat's Gaze, Bubblegum consumes 1 Claw Sharpener to automatically launch an attack, dealing Physical DMG. When any squad member activates Ether Veil, Sunna gains 2 Claw Sharpeners. When any squad member applies an Anomaly to an enemy, Sunna gains 1 Claw Sharpeners. This effect can trigger at most once every 10s. Bubblegum inherits Sunna's initial ATK. Sunna can hold up to 6 Claw Sharpeners.

DodgeCan't Hit Me

A quick dash dodge. Character is invulnerable while using this skill.

Dash AttackSkyward Hammer

Launches enemies in front into the air, dealing Physical DMG.

Dodge CounterDelusion Strikeout

Strikes enemies in front with a series of hammer blows, dealing Physical DMG. Character is invulnerable while using this skill.

Special AttackStar Shooter

Shoots Bubblegum to attack enemies in front using an air gun, dealing Physical DMG. After activation, Bubblegum enters combat.

EX Special AttackBubblegum Barrage

Hurls Bubblegum at the target, dealing Physical DMG. After activation, Bubblegum enters combat. Upon activating this skill, all Agents in the squad gain Angelic Chord-ination for 40s. Landing a heavy attack with this skill triggers a Quick Assist. Character is invulnerable while using this skill.

EX Special AttackSpecial Photography Technique

Attacks the target enemy in coordination with Bubblegum, dealing Physical DMG. After activation, Bubblegum enters combat. Before the heavy attack is executed, activates Ether Veil: Delusion Reprise. While Ether Veil: Delusion Reprise is active, all squad members gain an additional 50 ATK for 40s. Re-activating Ether Veil: Delusion Reprise will cancel the existing instance of Ether Veil: Delusion Reprise. Landing a heavy attack with this skill triggers a Quick Assist. Character is invulnerable while using this skill. EX Special Attack: Special Photography Technique can be used once each time Angelic Chord-ination state is entered.

Chain AttackDon't Mess With the Cat

Charges forward on Bubblegum, dealing massive Physical DMG. Landing a heavy attack with this skill triggers a Quick Assist. Character is invulnerable while using this skill.

UltimateSmash It All!

After a series of hammer attacks, launches Bubblegum to cause an explosion, dealing massive Physical DMG to enemies in an area. On activating the heavy attack, gain 6 Claw Sharp

Mindscapes

1
M1
2
M2
3
M3
4
M4
5
M5
6
M6
M1Loneliness Corruption SymptomsPull Target

When Sunna enters the battlefield, she gains 15 Energy. In Investigation Zone Mode, this effect can trigger once every 180s. When Cat's Gaze triggers and hits an enemy, the target's DEF is reduced by 7% for 40s, stacking up to 3 times. The duration of each stack is calculated separately.

Is it worth getting?

High: Immediate energy refund and target DEF shred significantly improves uptime.

M2Feline Go-With-the-FlowPull Target

While Sunna is within any Ether Veil, all squad members gain 10% ATK and she obtains 1 Claw Sharpener every 10s. The number of attacks required to trigger Cat's Gaze is reduced, and the DMG Multiplier on trigger is increased: When triggered by an Attack character, the DMG Multiplier is increased by 200%. When triggered by an Anomaly character, the DMG Multiplier is increased by 300%.

Is it worth getting?

Critical: Massive DMG multiplier increases for Attack and Anomaly triggers.

M3Transformation Apple

Basic Attack, Assist, Dodge, Special Attack, and Chain Attack Lv. +2

Is it worth getting?

Skill-level bump only — fine on the path to higher Mindscapes, not a pull goal by itself.

M4Delusion Investigation Team

When Sunna uses her Ultimate, all squad members deal 18% increased DMG for 60s.

Is it worth getting?

Solid mid-tier Mindscape — worth picking up if you're already invested, not a must-pull alone.

M5Galaxy Tramway

Basic Attack, Assist, Dodge, Special Attack, and Chain Attack Lv. +2

Is it worth getting?

Skill-level bump only — fine on the path to higher Mindscapes, not a pull goal by itself.

M6Hollow Big BangSkip

When Sunna uses an EX Special Attack, she enters the Focused Creation! state for 8s. While in the Focused Creation! state, all attacks Sunna performs are guaranteed to CRIT, and her CRIT DMG increases by 0.03% of her initial ATK, up to a maximum of 105%. While in the Focused Creation! state, Sunna's Anti-Interrupt Level is increased, and DMG taken is reduced by 40%. While in the Focused Creation! state, Sunna can trigger Cat's Gaze, its DMG being calculated using Attack Agent rules. If Cat's Gaze is triggered while Sunna has a Claw Sharpener, the Claw Sharpener is immediately consumed, and Cat's Gaze is reapplied to the enemy. While in the Focused Creation! state, DMG dealt when any squad member triggers Cat's Gaze increases by 50%.

Is it worth getting?

Niche: While powerful for solo-carry potential, it is unnecessary for standard support utility.

Sunna is viable and competitive at M0. First stop: M2. Endgame target: M2.

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