Have Sana Arisato/Yuki ( Minato/Makoto older sister) who is of the Apostle arcana, she is assertive sassy somewhat deadpan and sarcastic but well-intentioned and can hold her own, she hides behind her sassy front to hide tremendous mental pain of being an orphan all her life.
Design link: https/i.ibb.co/Gp68ttg/IMG-7294.png