there's something really ironic about swords guarding other swords. like they really need it LOL but ok, juzu is a couple hundred years younger than mika, which means that there was no possible way for them to interact before being summoned by saniwa. that being said, if you want them to have interacted back when they were serving master saniwa, that's cool. mika wasn't there for too long, but he did like to get to know everyone else. he kind of takes his role as one of the oldest swords in japan really seriously LOL that's why he a grandpa~ but anyway, i think by now you know mika, he's all soft and sweet, but also a little shit sometimes. he's just really easy to get along with and you know he's the type of cutie that'll sit around and just drink tea and look all pretty--mostly that's runoff from him never really being used to fight, he's a little bit delicate, but never say that to him. but i can't see mika not getting along with anyone, and like, sword brethren? he'd be very thankful that juzu was willing to do this job for him, and likely juzu won't have to do the guardian thing TOO often, since mika and kogitsunemaru are literally attached at the hip most times, but i think he'd bring all the others along to like, important meetings and stuff. maybe just to show off or...to make them feel more useful. he may ask juzu to accompany him places and leave kogitsune behind sometimes, if only to remind juzu that he's important and mika values that he wants to do this job for him.