Kaika,

Maybe this is the only way you can let your feelings out.
Sometimes our hidden selves let us react a certain way that our irl selves would never allow.

Hurt can't stay covered up forever. When you were younger, these things ( your brother, moving, being bullied, and parents with their own issues) may have hurt or frightened you and possibly you felt there was no one there to protect you. (I am speaking from my own experiences).

Maybe Satchell says how you feel (hurt, angry) and reacts like you really want to about the past.

It's ok to talk to your therapist about these things. . . and us too.
love ya!