Hey there, Corncob! This question is for your OC who is the least trusting of authority.
Q: How do they feel about sharing?
this is hard to narrow down.... i have a solid handful who are really, really distrustful of authority figures. at the end of the day, though, i think i have to go with Quil - even though he's at a neutral alignment currently, it's only because he tries to lay low most of the time, and doesn't usually do things to actively disrupt unless he really has to - he obeys laws when it suits him, and disobeys them when it suits him as well. however, i think he's the one who's the most outspoken in terms of his distrust, and has the least willingness to give an authority figure the benefit of the doubt, or even just to be polite to them. Peregrine and Foxglove both actively disrupt law (Foxglove out of a sense of goodness and justice; Peregrine because he likes doing illegal shit too much), but they are also both more likely to be polite, and Foxglove would like to at least give them a chance to prove him wrong first - Peregrine doesn't care as much as long as he can get away with what he's trying to do, and will actively work with authority if they can be, well, persuaded somehow to look the other way.
Quil might act otherwise, but he really mind sharing, and with a lot of things i think he's probably quite happy to give you a piece of something he has or something like that, even if he puts up a big front about it (frankly, he's often going "UhhIHGHHGhhGH ffiIIiinnNNEee" and doing something nice before anyone has even asked for anything; he just picks up on the fact that it would be helpful to do and does it, but. yknow. hes got a reputation to uphold, cant have people thinkin he's gone soft). With kids, he sees no reason to act like the big attitude tough guy, and will just gladly share if they ask for something.
there are a few things he doesn't like to let people borrow, touch, or otherwise share with him, of course -- unless he gives you explicit permission right then and there, don't mess with his violin. he doesn't let people touch his earrings very often, and don't even think about touching his little sister's necklace - not that you'll ever even see it, necessarily; he usually tucks it under his shirt and out of sight. i don't think this is really that unreasonable, though; everybody's got something that's just too special to really want others interacting with.