Lyra

Lyra is a young maid and a former servant of Yoki and Dante. An original character to the Fullmetal Alchemist series, Lyra is an extremely powerfull alchemist, reaching higher than the levels of Edward Elric's abilities, to whom she befriends shortly. Throughout the latter half of the anime series, Lyra's appearance personality is possessed by the primary antagonist of the series, Dante. Lyra's form, possessed by Dante, appears, during the events of Non-Disney Villains Tournament.

Non-Disney Villains Tournament
For the character's bio, see here.