Umino Gurio
Umino is the big geek in school. He's got the big spiral glasses, and he's got the funny looking clothes. He studies almost all the time and gets very good grades. He also ends up with a very pretty girl. (Naru-chan)
Umino is one of Usagi's good friends. He is EXTREMELY smart, and likes the internet and enjoys eating prune sundaes.
Umino fell in love with Naru in the beginning of the season and has been chasing after her ever since. She finally accepted Umino's love somewhere in the middle of the first season. As far as we know they are still together. They disappeared after the SuperS season.
In one episode, Umino dressed up like Tuxedo Kamen and called himself "Tuxedo Umino". He did this because he wanted to prove his love to Naru and show her he would do anything for her, even if it meant impersonating a hero.