Who Are You? (お前は誰だ Omae wa Dare da) is the fourteenth episode of Ultraman R/B.
Their father, Ushio Minato, uttered the words “Who are you?” under his breath as he turns to look towards Asahi, who had previously met the mysterious woman, Saki Mitsurugi. Saki suddenly leaves unexpectedly, but she leaves two new R/B Crystals before Asahi in her place. The two older brothers see this and have conflicting opinions about the R/B Crystals she left behind. Meanwhile, Grigio King attacks the city, as Ultraman Rosso and Blu have difficulty fighting against him as their breath slowly begins to get slower and slower…
- Katsumi & Isami: R/B Crystal Navi!
- Isami: We are going to be studying R/B Crystals now Katsumi!
- Katsumi: Yeah. Today's crystal...is this!
- Gyro: Grigio King
- Isami: Bombing Bone Beast Grigio King. Height: 60 Meters. Weight: 69,000 Tons. The Grigio Barrel attached to its back has absolutely devastating power.
- Katsumi & Isami: Be sure to watch next time!
- Katsumi Minato (湊カツミ Minato Katsumi): Yuya Hirata (平田 雄也 Hirata Yuya)
- Isami Minato (湊イサミ Minato Isami): Ryosuke Koike (小池 亮介 Koike Ryōsuke)
- Asahi Minato (湊アサヒ Minato Asahi): Arisa Sonohara (其原 有沙 Sonohara Arisa)
- Ushio Minato (湊ウシオ Minato Ushio): Ginnojo Yamazaki (山崎 銀之丞 Yamazaki Ginnojō)
- Makoto Aizen (愛染マコト Aizen Makoto): Motoki Fukami (深水 元基 Fukami Motoki)
- Saki Mitsurugi (美剣サキ Mitsurugi Saki): Ayane Kinoshita (木下 彩音 Kinoshita Ayane)
- Ultraman Rosso: Hideyoshi Iwata
- Ultraman Blu: Akira Okabe
- Grigio King: Hiroyuki Arai