Tia

A key B1 tank who opens taunt, shield, attack damage increase, and Burst re-entry all at once.
The more often cover healing cycles, the more her Burst Cooldown reduction and ally attack damage increase stay uninterrupted, contributing greatly in boss fights and hard story.
If taunt upkeep and cover management slip, survival wavers sharply.

Each time normal attack hits accumulate, she briefly gains increased Max HP of cover proportional to the caster's max HP, and at the same time taunts all enemies for 5 seconds. Each time cover HP is restored, Burst Skill Cooldown reduction stacks on herself up to 2 times, and all allies keep attack damage increase for 10 seconds. Using her Burst gives herself and all other allies a shield proportional to the caster's final max HP and applies Re-enters Burst stage 1 to all allies. On the same Burst use, she also gains cover HP restoration based on the caster's final max HP and healing based on attack damage.

At the start of a phase that needs taunt, press Burst first to lay down the shield and re-entry.
Keep landing Full Charges to keep Chameleon Invisibility2's taunt and Max HP of cover increase running.
Keep her on auto and only adjust Burst timing manually when taunt timing slips.

Prioritize Rocket Launcher Charge Speed with Adjutant Cube to shorten the taunt trigger interval. Supplement Burst rotation with Quantum Cube and fill reload gaps with Resilience Cube. If Harmony Cube levels differ a lot, use the higher-level cube before following the ranking.

Keep Elemental Advantage damage and ATK lines, and reduce Rocket Launcher gaps with Max Ammo. Prioritize Hit Rate and Charge Speed when taunt trigger timing slips.

Reptile Lover1 handles both Burst Cooldown reduction and attack damage increase, so it has the highest priority. Chameleon Invisibility2 is responsible for taunt and cover upkeep, so raise it next. Fill Burst at the end to scale re-entry and shield size.

In story, bosses, and Tower, she handles both front-line tank and Burst 1 cycler roles. In Arena, she is used in teams with aligned taunt timing to tank through while aiming for her Re-enters Burst effect.

One Burst applies both a shield and Re-enters Burst stage 1, speeding up the next cycle.
Once the cover healing trigger runs, she can steadily maintain Burst Cooldown reduction and ally attack damage increase.

If the all-enemy taunt fails, the front line can collapse quickly.
If Rocket Launcher reloads and Charge hits are interrupted, the taunt and cover enhancement cycle slips.