Kjelle is just as tomboyish as her mother. She has a kind heart and is protective of others, but tends to look down on weakness. She loves sparring, and if she sees someone who has ability, she will challenge him or her regardless of social standing. However, she hates people who look down on her because of her gender, just like her mother. She begins to receive fan mail from Sully's female fans upon reuniting with her mother. She likes armor more than anyone else in the army, both shown through the Army Roster and her supports with the female Avatar.