Sunna arrives in Zenless Zone Zero as an S-Rank Physical Support Agent from the Angels of Delusion, and her kit reads like a stagehand who rearranges the set while the actors are still mid-scene. She is the faction's resident song and music composer, the most active member on social media, and a character whose public persona blends determination with a sharp, sarcastic edge. In combat, that personality translates into a support who does not simply stand back and buff; she threads debuffs, energy flow, and timed entries into the team's rotation. Her community score sits at 9.7/10 from 27 votes, and the broader tier list places her among the strongest support options available in 2026.

🎼 Character Profile

Attribute	Detail
Rarity	S-Rank
Attribute	Physical
Role	Support
Faction	Angels of Delusion
Community Score	9.7/10 from 27 votes
Core Identity	Song and music composer; active social media presence; determined and sarcastic

Sunna's value lies in layering two separate support effects: Cat's Gaze, a detonatable debuff applied through her EX Special Attack, and Ether Veil, a field that raises team ATK. She is not a fire-and-forget buffer. She is closer to a tuning fork that only rings when the room's humidity is exactly right, rewarding teams that time their attacks and switches with intent.

⚙️ Best Builds

The central build goal is to push Sunna's ATK high enough to strengthen her Core Skill buffs. Reaching 3,500 ATK is the key threshold because it also grants some Energy Regen, which makes her EX Special Attack more comfortable to cycle. Builds that ignore ATK in favor of pure survivability or generic support stats tend to leave value on the table.

Build Goal	Why It Matters
Reach 3,500 ATK	Improves Core Skill buffs and unlocks Energy Regen
Prioritize Energy Regen	Smooths EX Special Attack usage and Bubblegum uptime
Maintain support uptime	Keeps Cat's Gaze and Ether Veil active through rotations
Avoid overinvesting in personal damage	Sunna's job is amplification, not main-DPS output

👥 Best Teams and Bangboo

Sunna can slot into several archetypes, but she shines when the team can continuously attack enemies marked by Cat's Gaze. A Billy and Anby core is a straightforward example: Billy benefits from Sunna's buffs while Anby supplies Daze and can Shock enemies. Sunna also works with any Attack Agent, though Ye Shunguang gains the most because Ether Veil helps Ye Shunguang enter the Enhanced State faster. Dialyn is the best Stun unit for that setup, adding Stun DMG Multiplier and a free Ultimate through her kit.

Team Core	Key Synergy	Notes
Billy + Anby	Billy consumes buffs; Anby inflicts Daze and Shock	Accessible, stable, and easy to pilot
Ye Shunguang + Dialyn	Ether Veil accelerates Enhanced State; Dialyn adds Stun pressure	Strongest Attack-Agent pairing
Aria Anomaly Team	Sunna buffs Aria's Charged Attacks; Aria detonates Cat's Gaze	Team was built before Aria's release and may be updated

Bangboo choice should reinforce the team's energy or ATK profile rather than distract from Sunna's support loop. The exact best Bangboo depends on the account and the team's rotation needs.

🗡️ Best W-Engines and Drive Discs

W-Engine ratings in the reference are based on performance at Update Level 0. For Sunna, the practical filter is simple: look for ATK and Energy Regen first, then any secondary effect that improves support uptime. Drive Disc choices should follow the same logic. There is no need to chase a niche personal-damage set when the 3,500 ATK threshold and Energy Regen breakpoint are the real targets.

🧠 Skill Priority

1. Core Skill — the foundation of Sunna's buffing and the reason 3,500 ATK matters.

2. EX Special Attack — summons Bubblegum and applies Cat's Gaze.

3. Passives tied to Cat's Gaze and Claw Sharpener — keep the debuff cycling.

4. Basic Attack and defensive tools — useful, but secondary to the support engine.

🎮 How to Play

Sunna's EX Special Attack summons her bouncy companion, Bubblegum, to inflict Cat's Gaze on enemies. When Attack or Anomaly Agents continuously attack a target marked by Cat's Gaze, the Gaze detonates. The damage depends on the stats of the character who triggered the explosion, so the detonator matters.

Whenever an Ether Veil is activated or any Agent inflicts an Attribute Anomaly, Sunna gains Claw Sharpener stacks. When Cat's Gaze wears off, Bubblegum consumes one stack to reapply it, keeping the debuff alive. This mechanic is like a cartographer sketching a map in vanishing ink: the route only remains visible if someone keeps redrawing it.

With Bubblegum on the field, it attacks when Sunna has enough Energy. When those attacks hit, pressing the Switch button at the precise moment brings Sunna in for a coordinated attack and activates a special Ether Veil. When Sunna hits enemies with Angelic Chord-ination, Ether Veil: Delusion Reprise activates and increases the ATK of all Agents within it.

📦 Materials, Mindscape Cinema, and Release Date

Sunna uses standard Support Agent ascension and talent materials, so players should consult the in-game tracker before farming. Mindscape Cinema nodes that improve Core Skill value, Energy flow, or Cat's Gaze uptime are the most natural priorities. Her Signal Search banner, Whimsy in Triple Meter, last ran in Phase 2 of Version 3.0 from July 8 to July 28, 2026, alongside Norma's debut banner.

🎤 Voice Actor and Lore

Voice actor information is not specified in the reference, but Sunna's lore paints her as the Angels of Delusion's resident song and music composer. She is the most active member of the group on social media and appears armed with equal parts determination and sarcasm. That characterization fits a support whose gameplay asks for timing, observation, and a little theatrical flair.

Sunna is not a support who simply presses a button and disappears into the background. She is a conductor for teams that are willing to watch the field, time the switch, and keep the debuff alive. In 2026's roster, that makes her a precise, high-value pick for Attack and Anomaly compositions alike.