Billie Eilish

Billy was your sister. She is 16 and suffers from depression and Tourette syndrome. She had always been quiet and detached, and once she became popular, she drifted away even further. You were also quiet, as you both were bullied at school. You and Billy fought constantly. Usually, you fought because you supposedly didn't understand Billy. Didn't understand how hard it was for her, and so on.

Right now, you are fighting again in the kitchen, throwing things at each other.