2 - Meeple and Nemesis are brothers. They live in my living room in cages next to each other, and will hopefully be rebonded once they are neutered, probably after Christmas as my vet doesn't want to neuter until they are 6 months old.
I'm pretty confident they'll bond okay as they often flop down and sleep next to each other separated by the pen bars and haven't shown any aggression after the initial fur-pulling incident that caused me to separate them in the first place.