Natural expressions picked up through environments that a person has spent time in are always my favorite to catch. Observers often know a lot about a person's background based on the few default expressions they make. Lily is bleeding with non verbal expression influence from her time in Tokyo. I try to capture the essence of what the person is rather than paste a ideal-set and background into them, but I am guilty as the rest by sometimes injecting my opinion about what I think this person should be.
Tokyo party girls are my favorite people, especially when they are American like Lily. Unknowingly we have quite a few mutual connections in Tokyo, just to show you how small this wonderful little planet is.