Tsujiai is a classmate of Kaji, Ayu and Nina. He is the head of the male tennis club and is a slightly extravagant person. Ayu seems to hate him because at the start, he always managed to destroy her chances with Kaji one way or another! Tsujiai introduces Nina to Doraemon (which she loves!). His best friend is Kaji. He also likes Nina which is shown more in the manga than in the anime.
He has a cat name Shinnosuke. He is the second person know that Nina was a magic girl because he see Rio the cat transforms into human.
Vova
