Argus:

Gemma Simpson - The only thing I could see with this is Argus checking in on Gemma under the pretence of seeing what his daughter is getting up to but with that being said, I can't see much beyond that as I don't think he'd have a super vested interest in keeping an eye on her friends tok. Unless they were to bump into each other or something. I'm unsure if Gemma would be aware of Argus/Bellas relationship?

Thomas:

Eugene Scamander - For sure, I can definitely see these becoming friends during their school years. Tommy is quite easy going and friendly, if a bit dimwitted sometimes. I think Eugene would definitely be someone Tommy would have tried to play pranks with during their school years and someone he'd remain friends with after the fact.

@'February Lynch' & Gemma Simpson - Tommy would love to be able to talk sports with these and maybe a friendship or something with them (maybe romantic interest - potentially) could form.

It's entirely possible that February could know Thomas if he's ever played against her twin when they played professionally, which could be super interesting.

All the others - Throw them all at Tommy!! :P