Who is TETSUYA #2? - Tetsuya #2, also known as Tetsuya NigÅ, is Tetsuya Kuroko's pet dog and serves as the mascot for the Seirin High School basketball team in Kuroko's Basketball. Found abandoned by Kuroko, Tetsuya #2 is a fluffy and adorable dog who quickly becomes a beloved member of the team, wearing jersey number 16 and adding a light-hearted charm to their dynamic.