Leon Kennedy cg headcanons:
Dad jokes. DAD JOKES. **DAD JOKES**. Whether you laugh or not is irrelevant. He'll laugh anyway.
Can pick you up. Listen, hes ripped (as seen in re9). No problem carrying you around, which is amazing if you're a baby!re, maybe not so much if you're a toddler!re.
I think hes willing to be sterner, not harsh, but he definitely has the willpower to put you in the corner or make you write lines. When out of timeout, he'll walk over and say "now tell me what you did wrong" and one he senses you genuinely learned your lesson he'll smile and hug you.
I do definitely believe he suffers from ptsd and other mental disorders like depression, he suffered from alcoholism in the past as well. I think on days that he's worse he wont be able to care for you, and that feeds into his guilt of not being able to save or help anyone. I think on days like this its best to sort of leave him be, even though it hurts you both.
I think he also regresses to a degree with you. Maybe not fully to your level, but assuming we're talking mainly about re9!leon, I think he enjoys doing things like coloring, playing, watching tv, running around, ect with you because it reminds him of simpler times. I see him as a more toddler/kid!re, but maybe once in a while on super bad days he could be a baby!re.
Mediocre cook. He can, but dont expect much. Some scrambled or fried eggs in the morning (maybe an omelette if he's feeling adventurous), lunch and dinner is simple foods like pasta, or whatever frozen meal he picked up at the store. If its a bad day for him, he'll usually call something in, eat a few bites, and nothing more. It's not much, but its better than nothing.
I think he enjoys going outside and doing things with you. If you were a more active!re, he'd enjoy running around and doing your prefered sport or activity. I think most people can enjoy running through a sprinkler and playing with the hose though.
If you're a less active!re, I think he would initially try to coax you into going outside and doing more, but he'd eventually come to accept a less hellish lifestyle. Its what hes used to, give him a break. I think he would enjoy playing board games though, and maybe let you win (but deny it).
I genuinely believe hes one of the better and safer bets for caregivers. Hes nice, sweet, good with kids (as seen with grace), and can meet you where you're at. However, he also comes with his own set of demons and trauma that will inevitably cause problems. He's not perfect, but he still loves you dearly
Sorry for those who wanted pure fluff and lightheartededness, but I felt like ignoring his trauma was a disservice to his character