Oooh, yes probably! I'm living in France right now, so you're like my neighbor. :3
I just checked Larissa's schedule, and they do have a few classes together! Arithmancy, CoMC, and Charms, I think, and doubtlessly classes in other years as well. Oh ho ho, she likes debating? I think they'll get along interestingly since Lei really enjoys that as well, especially if she doesn't take it personally. Leicester tends to argue/debate for the sake of it rather than because it's his opinion, so he doesn't get heated or emotional, even if he does have his opinions. We should definitely write them and see how well they get along!
Haha, kind of amusing, but some parts of Leon are like Leicester on the inside -- he can be really dreamy and has romantic ideals but those are deeply buried. >.> I think for that reason alone Lei would enjoy being around Leon. And they both have cats!
I think it's possible he knows Anais, or at least knows of her if they haven't talked much directly. I'm sure he has been enjoying the opportunity to practice his French on the people from Beauxbatons. But if they have talked before, he would have enjoyed her accent -- although it might have taken him a bit to get used to it and understand the French under it.
I don't see Kevin and Leicester having interacted much either, but I love the potential in the animagus thing! Although...haha, if Leicester was ever around Kevin + boggart, he would get a huge laugh out of his zombie fear. ...And amusingly enough, he would not want to be around Kevin's patronus.