Meteorite

Karla Sofen is a character who appears in Avengers Assemble, voiced by Elizabeth Daily.

She is a former psychiatrist who turned into the supervillain Moonstone. A Kree gem gives her the ability to fly, the ability to phase through solid objects, the able to shoot energy beams from her hands and the ability to control gravity, and she uses these powers as Moonstone to try and take over the world and destroy the Avengers.

She later resurfaces as the superheroine Meteorite, helping the Avengers defeat Growing Man.

Appearance
Moonstone appears as a member of the Masters of Evil in the episode "Under Siege" and later as Meteorite of the Thunderbolts in the episodes "Thunderbolts" and "Thunderbolts Revealed".