As the daughter of the first sword emperor, Aino was taught from an early age that only those with sufficient strength have the right to speak in this world, which led to her developing a cold and dark character.
Even if her father was killed, she didn't care. Instead, she admired the man who killed her father.
Aino hates all people and things that affect her emotions. According to her words: she nips all people and things that affect her emotions in the bud (she has deep feelings for Balian but she doesn't realize it)
I am inspired to write about Balian