For the character thing: Sunny Baudelaire?
[I was actually JUST thinking about this, so congratulations on your apparent mind-reading skills!]
BroTP: Her siblings, of course, but more to the point - INK!
First headcanon that pops into my head: I like to imagine that Sunny has a particular fondness for things that are often considered an acquired taste outside of their regions of origin, like salted black liquorice and century eggs and durian. As she gets older, she takes particular pride in hunting those foods down and keeping them around the house to snack on and to offer to visitors. If a new acquaintance accepts the offer and reacts favorably - or politely, if they don’t like it - to their bite of lutefisk or nattō, there’s a basis for friendship. If they’re rude about it, though, Sunny never quite warms to them.
One way in which I relate to this character: I adore cinnamon in my hot chocolate.
Thing that gives me secondhand embarrassment about this character: My gut reaction was “that time she had to run around wearing a fake beard,” but no, no, there is nothing at all embarrassing about Chabo the Wolf Baby.
Cinnamon roll or problematic fave?: Tiny and powerful cinnamon roll made with real cinnamon, not cassia - and she would know.