Unknown as at yet.

Hermione inherited Buttercup when Rainer disappeared because witch buddies and witch hats. Hermione's other Mismagius is DELIGHTED to have yet another ghost on Hermione's team, let alone another Mismagius.

Absorb, Psywave, Spite, Astonish, Confuse Ray, Mystical Fire, Power Gem, Phantom Force, Lucky Chant, Magical Leaf, Growl, Mean Look, Hex, Psybeam, Pain Split, Payback, Shadow Ball, Perish Song, Grudge, Confusion