I can't tell for certain, but it seems that Jean and Frederic work together pretty well. They might have a friendly rivalry, but they seem very cordial and brotherly amongst each other. Then again, they know that I'll be paying attention to everything - so I'm sure they know to portray strength and unity while in a public setting - who knows, maybe they're not as agreeable behind closed doors? Jean is generally very soft spoken, but he does pipe up quickly when the occasion calls for it.