First off, I like how a lot of the team is sorta magically oriented, but in pretty different ways! Then there's Ken, who's a product of science but has semi-magical powers, and then Bailey, who's full on science and the newest member.

Secondly, Ken/Rising Son's not as enthusiastic as Lucille about wanting to be friends with everyone because I think inherently he'd be just too reserved and chill, though he's definitely loving no longer being a laboratory experiment and really getting to experience the wider world. She'd probably help him loosen up a bit with her constant genki energy.

I could definitely see a rivalry between Ken and Bailey, albeit maybe not an antagonistic one? They have pretty divergent interests and opposing personal traits, and Rising Son was raised/created by a world famous scientist who was neglectful at best so technopathic powers could rub him the wrong way a bit. Rai's not the type to get hostile over it, but I could definitely see an interesting dynamic between them.

Marlin would probably be someone Rising Son is pretty comfortable around since both of them do a lot of reading and are fairly chill (Rai's powers even [i]depend[/i] on his ability to maintain chillness) but he'd probably try and push Marlin to be a little more active. Also maybe try to teach him kung fu so he's not so squishy.

I'll reserve any relation building for Justice until her personality in and out of powered mode gets resolved, I guess.