Anyway, this is Kade Vayle. An assassin, obviously. She's based loosely on Assassin's Creed and the Night Angel trilogy by Brent Weeks. Although in NA, they're called "wetboys" and the term "assassin" is considered an insult. xD But yeah. The red scarf and the trim on her waistcloth are a representation of her skill-level. A plain white cloth is given to the rookies. Blue is for "apprentices". Red is for the next level up from that (and if you have a red cloth, you can have your own apprentice as well), and black is reserved for the "masters". I've got nothing else figured out, so don't ask.
Yeah, Bloodlines is pretty good too. Better insight to Altair's character, I think. Doesn't help that I was already an Altair-fangirl from the first game, but now I hear that he's coming back in Revelations. *squee*