Oda is portrayed to be one of the most dangerous Btoom! players. He was Ryōta's best friend in high school and they often hung out together. Their friendship went downhill after Oda had sex with Ryōta's crush. Back then, he was competitive, good at everything, whether it be sports or grades, extremely popular with both guys and girls and always cheerful and somewhat insensitive. He dropped out of school and became a host, even owning a club, but his reasons for being nominated are still a mystery. He encounters Ryoto when they were trying to get to a food supply case and it does not take long for them to recognize each other. He intends to have Ryōta join his side, but has no intention of relenquish leadership to him, until both he and his partner Hidemi Kinoshita are cornered by four other players and he intends to abandon her and escape by himself until Ryōta appears to rescue both.