Mihara: Bonding Chain

As a Fire Machine Gun, her strength is a damage structure that lays down damage over time and then pulls it in all at once with Bonding PainB.
Her Capture Chain and Chain Wrap stacks vary greatly depending on whether she used her own Burst Skill right before Full Burst ended, and whether she filled 40 normal attack hits during Full Burst.
When the element fits, she is very valuable in Solo Raid and boss fights where enemies are Wind (Fire advantage), but in lineups short on ATK buffs her intended firepower may not show.

At the start of battle, Body Contact1 fills Capture Chain to max. When Full Burst Time ends, if she used her Burst Skill just before, Capture Chain refills. At set timings she strikes random enemies once per Capture Chain, reducing Capture Chain with each hit and applying Chain Wrap damage over time to the same enemy, stacking up to 20 times.

Tighten Up2 adds stacks to Chain Wrap targets when her normal attacks land 40 hits within Full Burst Time, and adds a large number of stacks to Chain Wrap targets if she is incapacitated. If an enemy with Chain Wrap is removed, she gets Capture Chain back. On entering Burst stage 3, she grants herself increased damage over time for a set duration.

Bonding PainB applies Chain Pull damage over time to targets under Chain Wrap, reflecting the Chain Wrap stacks built so far, and removes Chain Wrap when the effect ends.

Use Bonding PainB right before Full Burst ends to refill Capture Chain through the Body Contact1 condition.
During the same Full Burst, keep normal attacks landing without breaks to raise Chain Wrap stacks through Tighten Up2's 40-hit condition.
Timing Machine Gun overheating and reloads by hand reduces the stack loss when rapid fire breaks.

Her reload is long and she burns a lot of ammo within Full Burst, so prioritize reload-easing Harmony Cubes. The Bastion Cube keeps rapid fire going with ammo refills. In squads with fast Burst rotation, consider a cube that fills Burst Gauge as a second choice. If cube levels differ a lot, use the higher-level cube before the ranking.

Set Elemental Advantage damage and ATK as the baseline. She burns a lot of ammo within Full Burst, so adding Max Ammo lines reduces stack breaks from reloading. Match leftover lines such as Critical Damage to her weapon specs.

Body Contact1's Chain Wrap damage over time makes up a large share, so raise S1 first. Tighten Up2 handles stacks and the damage-over-time increase buff, so raise S2 next. If you aim for high Bonding PainB spikes, max the Burst too.

Her strengths show well in Solo Raid and Union Raid where she has Fire advantage, and against coreless bosses. Against enemies with long debuff immunity, her Chain Wrap and Chain Pull contribution drops.

She can stack damage over time within Full Burst and then unleash it all at once with Bonding PainB for spike output.
Even placed off-Burst she can keep up DoT damage, so you can swap her between lineup slots.

Body Contact1 targets random enemies, so Chain Wrap may not stick only to the enemy you want.
If you handle overheating and reloads poorly, you often miss the Tighten Up2 40-hit condition, and without ATK buffs her felt firepower falls behind quickly.