Byakuya is a cold and self-centered person who is very reserved. He is not interested in co-operating with others due to his own sense of self-superiority and his opinion that others are, on the whole, lesser than him. However, Byakuya's emotional detachment and lack of empathy towards the others sometimes made it very difficult for him to understand the reasoning for why people would behave altruisticallu or based on pure emotion and empathy. He's a pure cunt with a ego and he's fucking rich.