Mihara

A Water Code Burst 3 Assault Rifle DPS who uses her Burst repeatedly to stack Highway to Hell2, then aims for screen-wide attack firepower.
She's rarely a main pick in Story, boss, or Raid main slots, and her Burst cuts ally Full Burst time by 5 seconds, burdening team rotation.
Mihara: Bonding Chain is the better choice for the same slot.

Each last-bullet hit raises her own Crit Damage. Using her Burst Skill grants a long ATK buff via Highway to Hell2 1, and using her Burst Skill again in that state adds Crit Rate via Highway to Hell2 2. Her Burst Skill damages all enemies and deals extra damage once more at Highway to Hell2 2, and at the same moment all allies' Full Burst time is cut by 5 seconds.

Fire through to the last bullet to keep the Endure1 Crit Damage going.
Each Burst Skill use raises Highway to Hell2, and at Highway to Hell2 2 the same Burst Skill gets extra damage.
Leave her on auto by default, and only manually time the Bursts that stack Highway to Hell2 up to 2.

There's little evidence in the recent meta for pairing her in the same squad.

Ammo recovery and reload let her meet the last-bullet condition more often. For accuracy, the Assault Cube supports Assault Rifle shot grouping. If Harmony Cube levels differ greatly, use the higher-level cube over the ranking.

Highway to Hell2 2 and Endure1 rely on crits, so prioritize Crit Rate and Crit Damage lines. Match ammo to her last-bullet hit frequency.

Highway to Hell2 stacks ATK and Crit Rate with every Burst use, so raise S2 first. Sense SharingB carries the screen-wide attack and the Highway to Hell2 2 extra damage, so raise Burst next. Endure1 is last-bullet support, so keep it low.

She's almost never used in regular lineups. She might be mentioned as substitute firepower only in special cases such as Solo Raid bosses with long debuff immunity.

In the Highway to Hell2 2 state, her Burst Skill's screen-wide attack hits twice.
Last-bullet hits can raise her Crit Damage.

Her Burst Skill cuts all allies' Full Burst time by 5 seconds.
Stacking Highway to Hell2 up to 2 requires using her Burst Skill multiple times, which slows team tempo.
As an SR, her output is lower than current meta DPS slots.
Mihara: Bonding Chain is the better choice for the same role.