Augusta Robins, WCHB, was the year below, major tomboy, played quidditch at school and now professionally! Also friends with Winnie, so her opinions of him will be coloured by that, but she is also a Pennyworth resident so they might still get on or have a ~friendly rivalry! xD

Tybalt Kirke, MCMB, was a couple years younger than him in school, but also quidditchy and local to Hogsmeade and bad influences to tempt him with childish shenanigans are ALWAYS welcome, even though he is, gasp, a father now xD

Yassine Bensouda is UCPB and a quidditch sponsor and not an obvious associate but is down for ~slumming it on occasion and 100% up for a brawl or confrontation if banter goes south and/or the opportunity presents itself. (Also, coincidentally, has some loose acquaintance with both Esteban and Henri if either of those are useful as an in?)

Viola Corner is WCHB, lives in Pennyworth and works on the High Street, is a general chatterbox if he needs gossip from the modiste's and very easily swept off her feet if he wanted to flirt. xD