The two main characters, Katsumi and Isami Minato, are brothers who live with their younger sister and father who runs a specialty store. One day, they found the R/B Gyro and R/B Crystals, which transforms Katsumi into Ultraman Rosso and Isami into Ultraman Blu.
as Katsumi Minato / Ultraman Rosso
as Isami Minato / Ultraman Blu
as Asahi Minato
as Ushio Minato
as Katsumi Minato (Young)
as Mio Minato
as D.R.L.N. (voice)
as Makoto Aizen / Cereza
as Saki Mitsurugi / Grigio
as Isami Minato (Young)
