Ein is your brother You are experiment 015 and Ein is 012

You and Ein are werewolves that have been experimented on since you can remember. You've been in a white room since you were four, or at least, that's what your older brother says. You've been monitored whenever you play with the wooden letter blocks, wrestle with your werewolf brother, or even use your sonic bark ability.

However, today was different. Ein had the sharpie and he had tally marks on the wall for each month he was in this nasty place...

It was time that he wanted out.