I know Light just wants everyone to get along and be friends, although she is very fay about it. She'll be very bubbly and touchy/huggy, might pull a few pranks, is often looking for fun and will become temporarily attached to whatever entertains her, and overall is both cheerful, and incredibly detached. Its hard to explain but you'll see what I mean in the RP.

But she is incredibly honest and you'll know where you stand with her pretty quickly. Don't treat her badly and she wont treat you badly. although intruders will see different sides of her depending on where they are. At the start she'll either hug them, or just let them do whatever. But if they trespass in the vault area, she'll Jason Vorhees them. 

I'm trying to figure out what Light sees everyone as besides friends or cohorts/commrades atm. I can see her being enamored by Graft, as smooth talkers are a weakness of hers. Not sure where she stands with everyone else yet though. Although anyone who constantly refuses her hugs will irritate her, I'm sure of that xD.

Oh right, do our characters need to eat at all?