If i remeber right he's johan's brother
oh then isaac and jess look a like.
I'm also thinking that maybe Johan has a grudge against Isaac and then he takes out his grudge against Jess also carried by his desire. Lmao
Or maybe Obsession
I guess he's gonna do expirements on this lady vampire to pressure jess to help them i guess since johan doesn't do anything to jess that's if isac knew this lady knows jess
Who's Isaac wut???