Junior High School student
Ryo was originally Bunbo, one of the Seven Great Youma that served the Dark Kingdom until Queen Serenity reincarnated them as normal humans in present day earth.
As a human, he became Ryo Urawa with psychic powers.
He briefly attended Juuban Municipal Junior High School and was gifted with precognitive skills which allowed him to score highly on tests. He had a crush on Ami due to her high intelligence. His powers allowed him to know that he was one of the Seven Great Youma, as well as know Ami's identity as Sailor Mercury. He thus asked Ami to kill him so that he would not harm her, but Ami refused and Sailor Moon healed him.
Following this, he transferred to another school, but later reappeared to warn Ami of a plan by Beryl to revive the Seven Great Youma. He is later seen spending time alone with Ami.
- Though he's shown to be the guy for Ami, their relationship isn't a focus of the series as a whole. He isn't even seen much with Ami throughout the series.