Katie will be friendly, though I can't see her having much interaction with Rémy outside of the journals?
And Ingvardine (as you may have already noticed) is unimpressed with the French students complaining about the weather. Idk, sometimes she can be perfectly civil, other times she's a bitch. :| But if Rémy is easy-going then that'll probably help smooth their interactions -- they're in four classes together (Runes, Arith, Charms, Transfig) and also Choir.