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.
Katsumi Minato / Ultraman Rosso
Isami Minato / Ultraman Blu
Asahi Minato
Ushio Minato
Katsumi Minato (Young)
Mio Minato
D.R.L.N. (voice)
Makoto Aizen / Cereza
Saki Mitsurugi / Grigio
Isami Minato (Young)
