1/3 Dark AQ7

Top - DMG to all / Overdrive: ATK UP to all enemies
Middle - All allies DEF/Affliction Rate DOWN (3T) / Overdrive : Applies Doom to all allies (2T) [Target her first!]
Bottom - DMG to an ally / Overdrive: Random x4 DMG to allies / Combo Rate UP to enemies.

2/3

She has a 5T Charge Turn, so you need to beat her in that time otherwise you'll most likely be dead or close to it heading into 3/3
First turn deals a Poison debuff that is -20% HP for 4T so you MUST block/cure it or bring at least 2 healers.
When she gets stunned, she deals DMG to all allies, then kills herself, lmao
Just kill her before she can use her overdrive, bc that does ike 12-15K DMG to all allies.

3/3

Obviously like every other AQ7, you have to use an ability every turn or she'll deal DMG to all allies and grant a DEF debuff to everyone.

Normal Overdrive just deals DMG to allies and grants a 1T ability seal, so better to have RST/block
Raging Overdrive is awful as usual, x4 huge DMG to random girls.

and, like the Thunder AQ7, the dark one has a chance to increase her maximum charge turn if you use one of each flavor ability. UwU