Romana didn't mind talking to him when they first met (which doesn't sound like much but is kind of impressive in and of itself because she's awful at socializing, especially with humans), so she'd be up for talking to him or meeting up again at some point! She's not combat-inclined at all, but she can give some pointers regarding bending and she's also a major workaholic. Most of her work is research-oriented, studying the city or mapping things out or refurbishing older buildings, but she could probably help him find something to get involved in one way or another!

Sora hasn't been bending as long as Romana has, but he is good with bending back magic (and he likes fire more than he should) so if Sabo ever wanted to practice or spar or anything he'd totally be game. Aaand then Pinocchio might be throwing a party with Agatha at some point in the future so if he does he'll totally reach out and invite Sabo. He strongly feels like everybody should be able to attend a party on a regular basis >(