Glea

A swordsmanship teacher at "The Mansion of Swords", she's spent 20 years rebuilding the reputation of the school after Ascheriit was labeled a traitor. She taught Ascheriit and hates Glenn for killing him. Glenn has told her of his murder of Ascheriit and the other Lances of Betrayal, but he does not reveal the truth of what transpired, claiming he murdered them for the empire. She wished that they could have at least preserved their names as heroes rather than calling them the "Lances of Betrayal".

(Source: Übel Blatt Wikia)