Compared to Clove, Cassia is vocal, hot-tempered, sarcastic, impulsive, and rather overconfident. She has been described as "bratty", and will talk down to people much older than her. Cassia dislikes being weak or under-equipped, and despite her immaturity, she has a sense of respect and honor. Cassia seems to be determined to prove she is just as capable as Clove thanks to her cybernetics, and she is deeply frustrated by feeling weak.