Alright, time for me to get a few ideas out here for you, so breaking down on the 'Secret Walkway of Kai' ~
@Senan ConnellIs being brought up because I think it would be pretty interesting having yet another Ireland native to encounter in the school. (Aside from the few that he has met so far.) He's a Sturt and it's pretty common knowledge that his only -actual- friend is @Maxine Williamsbecause he's a bit of an asshole. While not friends, maybe potential rivals or even frenemies. It maybe possible, depending on well informed that Finn is of the various Wizarding families in Ireland, that he knows that the 'Connell' family had been once known as Deatheater's and Supporter's of the 'Dark Lord' and only recently started to 'amend their ways' while underneath that surface it's known that many of them are still active agents of the Dark Arts with a different focus now.
@Travis FranklinIs a Bourke, and odd one at that, as he's actually one of the few that isn't involved in any form of sports. (He finds it just outright cheating because. . . *DRUM ROLLS!*) He's a Werewolf, which is now no longer a well kept secret as it had been made known not only from a recent DADA class but also suspected by a few from the murder of his mother. He's always up for a challenge, however, if only to prove that he could do something and just holds back for the sake of doing so. (Currently, might be less challenge hungry, but it doesn't mean it can't happen even in the given circumstance!) A potential friendship there or even a best friend of sorts, given that Travis actually tries to extend his hand out to the new Bourke house members. Get them to feel at home in a new or strange place especially if they aren't fully aware of certain nuances.
@Alexander WinfieldHe's a nice sort, friendly and the kind that walks up to just about anyone with a friendly grin and an extended hand of introduction. He's a Spencer and the younger (And overly protected brother) of @Adele DeVylisseawhom is the schools librarian. Though he brags about his Sister like she's the best thing since sliced bread their personalities are vastly different for a lot of reasons. He's a Musician who recently made it to the scene of Television, Radio's and other media outlets as well. I can see him greeting Finn, even finding out what kind of things he gets into as a way to try it out himself.
@Phoenix AuroraIs a chaotic individual and by that I mean he's the sort that would intentionally push someone into an adventure they never asked for, his primary choice of meat in that regard? The broody and the moody! Whether that earns him more friends or more enemies it's hard to say, but he could be someone that tries ways to break the ever amount brood on Finn by just getting him into really high-end adventures that could be recorded in some diary.