wizology his ex from hogwarts which was tumultuous and toxic and disrupted their last year at school (we could perhaps backthread too), a couple good friends he had that year, irish characters particularly from northern ireland, his former auror partner who is still at the ministry who he's trying to mend fences with for quitting so abruptly, someone he lives with when he's off for holidays, and maybe a sibling if anyone wants to bring in family