iDoll Sun

A Burst 3 Iron Assault Rifle, but all her skills only affect her own DEF, ATK, and ammo.
She has no main-pick usage in Story, bosses, or Raids.
Due to her R rarity and low self-buff values, she is barely worth investing in.

Every ten normal attack hits, her DEF briefly rises, and when hit she has a chance to gain ATK. Her Burst only greatly increases her own Max Ammo for 10 seconds. She has no ally buffs.

Keep firing on auto and her DEF rises every ten shots.
Her Burst greatly increases her own Max Ammo.
Auto is enough by default.

There is not enough evidence in the recent meta for pairing her in the same squad.

To use her ammo Burst, match reloads with Resilience Cube and refill ammo with Bastion Cube. If Harmony Cube levels differ greatly, use the higher-level cube over the ranking.

As an R Nikke, she is not worth much Overload investment. If you use her, keep a few Max Ammo lines and put the rest into ATK and Crit.

She is not a meta main, so skill books are rarely spent on her. If you must, raise only SunsetB to 4; Sunshine1 and Sunlight2 are low priority.

She does not appear in top Solo Raid lineups. Use her only temporarily when your roster is thin early on.

Her DEF rises every ten shots.
When hit, she has a chance to raise her own ATK.
Her Burst greatly increases her own Max Ammo.

She has no buffs or healing for allies.
Her self-buff values are low and she contributes little for a Burst 3 slot.
An R Nikke with no main-pick usage.