Nayuta

As a Burst II support DPS, she stacks Memory Absorption-based core enhancement, her AsceticismB Burst's AoE damage to all enemies, and extra damage to stage targets all at once, giving high combat contribution.
Her core damage side kicks in after stacks build, so in short fights her ceiling feels lower.

The key is stacking Impermanence2 (S2)'s Memory Absorption every 3 seconds to keep Hypocrisy1 (S1)'s ally buffs and healing running.

At battle start, Hypocrisy1 grants herself Steadfast Mind: Indomitability for 9 seconds.
Then Impermanence2 adds Memory Absorption: Hit Rate every 3 seconds, and as stacks build, the effect tier by Memory Absorption stack count rises.
Each time Memory Absorption applies, Hypocrisy1 grants all allies core damage (by level) ▲ and caster's ATK (by level) ▲, and Equally shares HP recovery for even healing.

Using AsceticismB (Burst) grants all allies attack damage (by level) ▲ for 15 seconds, and Nayuta enters Memory Combustion: Weapon Change, fixing Charge time and granting unlimited ammo.
In this state, Full Charge attacks deal damage to all enemies, and if the target is a stage target, extra damage hits the same enemy, thickening boss damage.

Auto play works fine.
On manual, just time cover and dodges so Nayuta is not directly exposed to dangerous patterns.

Destruction Cube makes Nayuta's attacks during Burst hit harder against bosses and content with parts. Onslaught Cube (Charge Damage) reinforces Charge Damage in phases with few parts or shifting situations. Quantum Cube (Fills Burst Gauge) helps cycle Burst II more often.

Set Elemental Advantage damage and ATK lines first. Fill Charge Damage and crit as support. Charge Speed options, Max Ammo, and Hit Rate are low priority due to her fixed structure.

All-ally buffs, healing, and the extra damage trigger come from Hypocrisy1 (S1), and AsceticismB (Burst) has big combat contribution, so raise S1 and Burst first. Impermanence2 (S2) builds her own enhancement through stacks, so it comes later.

Good in story, bosses, and Tower for providing both core damage buffs and equal healing, raising combat stability and damage together.

Based on Memory Absorption stacks, she links core damage/ATK buffs and equal healing to all allies at the same time.
Her AsceticismB Burst deals AoE damage to all enemies, with extra damage on stage targets, thickening boss damage.
At battle start, Steadfast Mind: Indomitability gives her early survival stability.

Her core damage buff ceiling only kicks in after stacks build, so short fights are less efficient.
Charge time during Burst is fixed, so Charge Speed options and buffs are less efficient.