Descend: Behemoth is my big brother

Link to JP wiki

Pink girl
Leader skill:

3x attack when chaining 5 panels or more

Active skill:

100% attack for 1 turn for purple and orange

Behemoth
Leader skill:

3x attack when HP is full

Active skill:

Deals 35% of current enemy HP

Mission times (JST)
4/24 19:00 ~ 4/30 23:59