All right now to check and see where this all stands so far. Tsukiko has three people who she is starting to trust. They are Haas, Ben (hasn't given him her confirmation number yet) and Brad. Curious to know Scar, I'm sure Leander thinks of her as a friend knowing his character and all? 

I don't know about Michelle though. She did show affection toward her though that could have just been fear that she didn't want to hurt someone. Not sure about that and where those two stand at the moment. I know that one day she was very much a bitch to Michelle. Then again, that day she certainly wasn't herself. Anyway, I can say neither Ben or Michelle have been given her confirmation number. I believe the only person she has registered is Brad unless Haas gave her his and I don't recall that happening after her duel with him.