Fire Emblem the sorceress

Lilina had a great life, great friends, great family, great grades in school. but she also has a secret that only one person Knew. she knows magic, but magic that most people can't control. green magic. a very rare type. But what happens when someone goes hunting the users of green magic down, and starts killing them, it's up to Lilina to stop this mysterious villain with a secrest identity, the sorceress.