At the risk of mortally offending (and totally misunderstanding, not to mention misgendering) half the people at Susan's, I'll put in my associations.
You, my dear Taka, would be the cousin who lives way on the other side of the continent, who I have the feeling I could have a very special relationship with if we could see each other more often than once every few years and only at busy family gatherings. (I have a RL cousin sort of like that.)
LordKAT would be an older brother who has lived a very different life from mine, but cares anyway.
Aisla an older sister who I've always been a little in awe of.
Ms. Grace would be the aunt who is always there with aunt-ly advice and a hug.
Suzifrommd would be another aunt, who I disagree with a lot, but treasure for her open heart. (I have a sister-in-law like that.)
+ + +
This exercise is kinda hard for me, because my experience of family is of people with whom I have never had a relationship I could rely on. They do a passable job of acting like we're family when it doesn't require much effort, but when push comes to shove, whatever relationship we have evaporates.
The only people whose relationship I think I can trust are my two sons, and it's an asymmetric one, like most parent-child relationships. I have two sisters-in-law who seem a little more authentic than my birth family, but they're awfully prickly, which I don't know how to deal with.