TK is a character in the well-known anime Angel Beats!
In the anime, TK's real name is never revealed.
In he opening to the show, all of the characters are shown with their Japanese names in a speech bubble, and the English translation in the background.
TK's Japanese name is simply "TK", but in the background of the speech bubble, there is something written in English. (See the picture below)
(TK is on the far left.)
It looks to me that those letters say something like, "TH[???]"
Does anybody know what these letters are? And, do these letters signify TK's real name?