Gonna go with Lara here since in general have more thoughts on her tbh.

I have the hc the scarf she wears in p2 is made out of one of her parents clothes/that for a long time after her father’s death she wore mourning attire.
She’s French a design document mentions she looks like a French actress, so I believe she’s French on her mother’s side and spent winters with an aunt of her there.
She has pmdd
Got this idea from an oomf but lara dabbles in astrology, in her free time.
Lara got married a few months before the events of the game took place, it was a private ceremony and she doesn’t wear her ring due to an allergy to the material used in them (aleslara real in p4, ipl call me)
If she’s still alive in a post canon setting, Lara cuts her hair extremely short. Also really enjoy the idea of her gaining weight post canon as a sign of her getting to a better place mentally!!
I 100%% believe her and Daniil met as kids at least once, since their fathers were both military men. They don’t recognize eachother as adults for the fairly obvious reasons lol.
She’s allergic to palladium and sandalwood!!
Her and Yulia are exes.
Lara’s father definitely taught her how to shoot a firearm as a teenager/basic self defense in case it was ever needed. Similarly I think he was the kind of overprotective father trope you see in all types of media.
Lara gives me the vibes of a former smoker honestly, definitely something she picked up due to stress post her father’s death then quit due to feeling ashamed of the habit. (Imo she’d be a newports smoker same with Yulia)
Speaking of Yulia, Lara’s the one who commissioned that flask with yulias face on it as an anniversary present for her.
This isn’t really a hc more a personal association but imo the care bear Lara would fit the best is share bear that or care a lot bear (everything circles back to those bears)