"I think one of the stronger outside signs with us is how different we each are in terms of tastes (as well as body language and demeanour). If someone goes out to dinner with me they'll get "yum! ice cream!" and with Lyria she doesn't eat it."

We have that, but I don't think a person who didn't already know would notice it. Crist-Erui doesn't let himself be seen by strangers long enough for anyone to see what he eats or won't eat, and until fairly recently, Kír wouldn't eat at all, wouldn't even drink water. He does better now, but he's still pretty cautious about it. He drinks chai, whereas I favor coffee, but I like chai too, so that's not a sure sign.

I'm the only one of us who smokes, so that is a sure sign, but I don't smoke all the time, so it's only sure when I'm actually doing it.