Fitz probably knows him the least but he's friendly and all. Probably be more towards random run ins than anything since at the moment he's still working in the gift shop. But i think they'd get along.
Chuck will probably be the second of mine, after Freddy, to have the most to do with him since she's in Medical as well... though she's a magizoological healer and not a people one. but still! same department.
Then there's Freddy... and... nope got nothing. ;)