Tanaka (???, ???) is a student in classroom 1-9 of First Shibuya High School with Guren Ichinose in the light novel series Seraph of the End: Guren Ichinose: Catastrophe at Sixteen.
A shogi buff.
In chapter 4, Guren, Shinya, Mito, and Goshi play shogi against each other during a long lunch break. In the middle of it all, Tanaka steps in and joins them. He defeats all of them easily and gives them a good laugh.