Ittou Asanuma is a first year student at Moto-Azabu Private High School. He is good friends with Makoto. Ittou Asanuma admires Mamoru a lot, he believes that Mamoru is perfect, that he's the smartest student in their school, good at sports and really nice to juniors like himself. Ittou Asanuma wants to be just like Mamoru one day.
Ittou Asanuma overhears Usagi and Mamoru's conversation about Ami and Rei being missing and hears Luna talk. He helps Makoto home when she is feeling ill and gets zapped by static electricity. While at Makotos' home Ittou Asanuma tells her he heard a cat talking, she ends up telling him about her and the other senshi's destiny to fight the enemy. Ittou Asanuma wants to protect Makoto and says he won't tell anyone her story.
Blond hair and blue eyes. He is often seen wearing a school uniform