Enshrined by Extremity (まとうは極 Matou wa Kiwami) is the fifteenth episode of Ultraman R/B.
Makoto Aizen, an insane version of a hero, transformed himself into a formidable enemy who lost at the advent of Grigio King, leading to some infighting amongst the two Ultra Brothers! Even though both of them rise up against Grigio King, none of them are able to stop his wrath! Grigio King blasts his deadly cannon at them locking the Ultra Brothers in a desperate situation! Suddenly, Asahi rushes to the scene! As she speaks to them her words of encouragement, both Rosso and Blu start to be enveloped in a golden light…
- 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: Ultraman!
- Isami: The glorious first Ultraman. He's also known as an expert in monster extermination. Using both Ultraman and Belial's powers we're able to use the ultimate Kiwami Crystal!
- 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