This made me have to
think a bit as some OCs aren’t entirely clear to me what they would be into;

Terra

Short/Mid
distance races, arm wrestling, kickboxing / mixed martial arts, Volleyball. She likes a good mix of brawn and agility/speed for her athletic fun.

Harriet

Swimming races
(idk which kind… maybe freestyle??), free diving, Dance sports (initially
thought ballet but now I’m not so sure… either way a dance sport with a lot of
spins and exaggerated movement would be her taste), theater/acting (neither a
game or sport- but still). Harriet loves water but she also loves to show off and stroke her ego as the center of attention.

Demauria

Archery,
possibly clay pigeon shooting (some kind of shooting sport that needs
speed/precision at least), parkour(??? I’m surprised at this thought but ok
sure), fencing, possibly Hockey. Demauria can be a bit brutish but she likes accuracy for the most part. While I’m still going “???” at parkour, I could see her being into it more than Terra; in comparison to Dema, Terra much prefers her feet firmly on the ground.

Riivar

Tango dancing (obviously),
theater/acting, singing/karaoke, card games (as to what specific ones I’m not
sure… but the kind that use a basic standard card deck). She likes Style™ and definitely enjoys putting her lungs to use. I’ve always imagined Riivar as a bit of a clever character, so games reflecting that I think would suit her.

Anne

Strength Athletics, arm wrestling and/or maybe wrestling (? Canon Anne would probably be interested but I’m not as
sure that AU Annes’ would be into it). It’s surprisingly hard for me to think
of any games/sports that’d be her taste… and cooking/baking doesn’t really
count as either. Anne is capable of much brawn, but she’s quite brainy too, so I think it’d take me a bit to figure out something that would reflect both characteristics to tickle her fancy?

Kayla

she doesn’t like
to do sports, though she is capable of weightlifting despite her appearance (I doubt that goes beyond Canon Kayla though. I imagine most AU Kaylas tend to be average if not the least bit athletic, and hence not liking the sports even more). She’d be probably into most kids games as well as basic board games
(ex- red rover, red light, hide and go seek, checkers, tic tac toe), perhaps even video games for AU Kaylas (most group-based games like Mario Kart, Smash Bros, as well as maybe dating games and games like Harvest Moon). Kayla while able to appreciate skill-based sports she doesn’t really like participating in such sports, and I see her as being one who just wants to have fun and has trouble doing that with skillsports.

For other OCs like Abby, Lily, or Laurel I have currently no idea.