Noise

A near top-tier Burst 1 Defender in the Arena. Energetic Noise1 grants allies Max HP and continuous healing, and Sing TogetherB provides taunt and her own HP.
She is weaker than Noah's invincibility at blocking nukes, but absorbs some stacked nukes. She is not a main PvE Burst 1.

Sing TogetherB taunts the target on a Full Charge hit and briefly raises her own Max HP. Chorus2 reduces all allies' damage taken every 20 hits taken.

Energetic Noise1 grants all allies continuous healing based on caster's Max HP and a Max HP increase for 10 seconds. Her Burst cooldown is 40 seconds.

Land Full Charge shots to refresh Sing TogetherB's taunt and her own Max HP.
In the Arena, time Energetic Noise1 manually.
Firing and Charge can stay on auto, but when under focused fire, adjust her Burst or position.

Keeping another Burst 1 like Jackal on standby is safer. Her PvE Burst 1 role overlaps with Liter and Volume. If taunt timing overlaps with Noah, only one may survive.

For Arena healing and survival, go Healing Cube, Vigor Cube, then Tempering Cube. If you need Burst Gauge, Quantum Cube is the runner-up.

For Arena, prioritize 4 lines of Increased DEF and 2~4 lines of Charge Speed. Aim for 18% or more Charge Speed. In the Arena, skip Max Ammo lines so frequent reloads refresh Sing TogetherB.

Raise Energetic Noise1 first, then Sing TogetherB and Chorus2 in that order. For Arena only, Burst around 7 is already noticeable.

A core Burst 1 for Arena defense and nuke-absorbing lineups. Used for survival support and taunting in some bosses and Raids. Not a Story main.

Energetic Noise1 grants allies Max HP and continuous healing.
Chorus2 reduces all allies' damage taken when she is hit.
Each Full Charge refreshes her taunt and her own HP.

Her Burst cooldown is 40 seconds.
She struggles to hold against Noah invincibility or stacked nukes.
Her HP can drop fast under focused fire from Fire Code Shotguns.