Maruki is somehow his platonic housewife and Akechi is his son because he picked him up and brought him in like a soaking wet angry cat. I'm fairly certain he haunts the Machiya as an obligation, so at the VERY least they'll see each other there!

He's going to gravitate to Stellari because it's huge and he loves people, so maybe they can do some exploring together at some point! There's a lot of mess they can get up to.