Ebony

Ebony is Amoria's daughter and is not introduced until book three. Although Amoria has tried to train her to follow her footsteps, Ebony struggles assisting her mother, wondering if it is wrong. Ebony also has a crush on Cumulus, though he cares nothing for her. When he is killed by Amoria, Ebony begins to question her morals. (Spoilers ahead)

Ebony soon uses Amoria's teachings to make Time a manipulatable element. She hopes to use it sparingly to put an end to Amoria's "studies" (as Amoria calls them). She defeats Amoria by sending her back in time to nonexistence, unraveling her own life as well.