[@1Charak2] LOL Tsukiko ignored the fact Vincent ignored her. What did he do with the piece of paper she handed him? She gave it to him way before Transformer even assigned people to teams. Unfortunately, I don't know how Vincent can ignore her when she ignored to wait for his response. What he does with that piece of paper she left on his [u]seat[/u] is up to him. I added that part in there, because I'm not going to go back and edit a post I made a post before the one I made where she confronts Shiyu singling both Brad and Vincent out of her mind.

So you're not confused let me explain what happened, she did wait for Brad's registration number, but decided she was going to confront her brother's grandstanding instead of wait for Vincent's response. If anyone got ignored, it was Vincent. This all happened before Transformer assigned teams. Hey, but if you want to have him to pretend that she was paying attention to him then fine by me. But once she got assigned to Shiyu her mind directly went off Vincent. There is NO way he could ignore her during that time since her brother was front and center grandstanding like a typical Seto Kaiba disciple. I might also mention before hand that she confronted Vincent about eavesdropping on her which she did not appreciate. This is why Charak you need to thoroughly read people's posts instead of skim and tl;dr then you don't run into continuity errors like this one. 

By the way, Tsukiko confronted her brother who is Vincent's opponent. Vincent should realize that is her brother. I'm surprised he wasn't curious why she was whispering in his ear and what about. Usually that would make someone very suspicious. After she did that, she then confronted Shiyu reluctantly.