Rei Shingetsu

An exchange student to Heartland Middle School and a huge fan of Yuuma Tsukumo. Rei has his own catchphrase: "thinking positive". He quickly becomes Yuuma's friend, and has a borderline-fanboyish personality towards him. Ray has a very cheerful and loud exterior, which exasperates others at times. He is also very friendly and eager-to-please, but tends to rush recklessly into things and is quite clumsy. Although he usually has good intentions, Rei tends to cause problems or make things worse.

[Spoiler] It was revealed later that he was the human form of Vector, the evilest Barian Emperor, who wanted to make a fool out of Yuuma. Cruel and sadistic, he enjoys tormenting others for his amusement, even shown to have no compassion for his fellow Barians, even insulting them when they are hurt. [/Spoiler]