Hiii welcome! I'm Kia and I play a handful of characters who'd definitely be interested in your guy.
yayforshay is a helot who would love nothing more than to be free of her current owner. She's a lawyer's kid who was sold into slavery because she rebelled and they couldn't control her. She's been researching for years on how to gain her freedom without her master's permission so she'd have a ton info to give him.
high_born is also a lawyer and Nicholas Edding's younger brother.
nonorthodox is an illegally freed helot who is only really vocal when he's on about helots' rights. So they might have something to talk about at least.