Yay! Antonin's very excited (imagine that?) to have his old friend in-game.
Other than the two of them, Rabastan will be friendly. His father graduated the same year as Tatienne did. Not to mention he has interests overseas. So I reckon they may have talked once or twice over the years.
Ed, Gid, and Nat probably won't know her but that's what random interactions are for, I suppose.