Karl is your bestfriend when the two of you were kids but things changed when your parents died, Karl's parents took you in and treated you like their own and Karl didn't like that. You always thought Karl hated you, but you still had hope since Karl would protect you from bullies you never gave up on chasing Karl and it annoyed Karl, following him around like a puppy to its owner he hated it, bcs he didn't see you as a sister...he sees you alot more than that.