How I would rate the organization if Yuki joined them- kinda like a head canon I guess
Xemnas:
Pretty much.. he'd just be like the dad in the whole situation XD he gives the orders and tells people what to do.
Vexen:
^^"... probably that one older brother that Yuki would stay away from- he's too much of a scientist weirdo- she stays away from him so she doesn't become one of his lab rats. She loves him, just not as one of his subjects.
Saïx:
Not really sure. Probably just a friend to hang out with and rant to.
Luxord:
Pretty much the same as saïx, just a friend she can rant to or go to for help.
Roxas:
A close, best friend she can look up to and play with and help prank the others.
Xigbar:
He's like a big brother or dad figure (she didn't really grow up with one). She would go to him first to be honest before anyone. Anywhere he goes, she's most likely there annoying him X3.
Laxaeus:
...just friends- she doesn't talk to him often.
Axel:
Her favorite person, If love existed in a nobody, she would say she'd love him. Other than xigbar, she'd go to him next if xigbar wasn't available.
Marluxia:
Friends. She loves flowers and gardening and usually asks him for help.
Xaldin:
Another sort of father/parent figure. She likes to play pranks on him and tease him a lot.
Zexion:
Meh, close friends. Yuki likes learning magic and goes to him for help. She hangs out with him if she needs peace and quiet since when he's reading it's usually quiet so she hangs around him at least 80% of the time.
Demyx:
That idiot older brother.. she loves him to bits but sometimes he's just a bit.. of an idiot ^^"..
Larxene:
She doesn't even bother XD she gets too scared that she'll get bullied and doesn't want to bother larxene. She avoids most contact with her as much as possible. She even makes excuses if she has to go on a mission with her.
Xehanort:
Obviously the grandpa in this situation XD