Your fellow Wu-tang fan
I'm not sure who he is, he seems to be quite well-known. He went to yesterday's concert and said that last time he saw a concert this big was Rock the Bells last year, and that he decided to support Yuri.
Also in his later tweet, he compared Sica to RZA, Yuri to Meth and Yoong to Ghostface Killah, in which his friend replied that Seohyun was Inspectah Deck and Fany was ODB! What you think about that, toz?