Igraine Burnett

Igraine attends the same school as Firiel, where her sword fighting skills are rivalled only by Ravenna's. She agrees to train Firiel for her duel with Ravenna to avenge her friend Roselitte, who she believes was killed by one of the girls in Ravenna's faction. Later in the series, she is seen fighting dragons side by side with Eusis.

(Source: AniDB)