Oooh!! Dual swords sounds awesome. '^' Yamamoto would be up for sparring someone who uses multiple swords like he does, for sure. So yes sword buds could absolutely be a thing, even if Yam would be buds with him over basically anything. > >

Also yes, boss def. is, but he's best boss. Navi friends are also very good, because he can at least point them out to people who need help with their team. '^' 'Cause he will!