Malice

Malice is a female sellsword that first appeared in Part 3 of the Fire Emblem: Akaneia Saga; Thieves Gang of Justice. She will also be included in Fire Emblem: Shin Monshō no Nazo ~Hikari to Kage no Eiyū~. As mercenary seems now to be a male only class, it is likely that she will be a Myrmidon.

Etmyology
'Malice' means 'ill-will' or intent to harm due to hostility or hatred, which may hint at her personality.