Memory of Stardust (星屑の記憶 Hoshikuzu no Kioku) is the twentieth episode of Ultraman R/B.
Asahi reveals to her brothers Saki Mitsurugi’s past, who had just stolen from them their own R/B Gyro’s! Katsumi somewhat sympathizes with Saki, while Isami is actually angry at her. Suddenly, the kaiju Gomora appears in the city!
When Katsumi sets out to take back his R/B Gyro from Saki however, she transforms herself into Grand King Megalos, and stands before them! Katsumi and Isami are both in trouble now that none of them can transform…
- 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)
- Saki Mitsurugi (美剣サキ Mitsurugi Saki): Ayane Kinoshita (木下 彩音 Kinoshita Ayane)
- D.R.L.N. (ダーリン Dārin): Kaede Yuasa (湯浅 かえで Yuasa Kaede)
- Ultraman Rosso: Hideyoshi Iwata
- Ultraman Blu: Akira Okabe
- Grand King Megalos: Kenji Kajikawa
- Gomora: Kazunori Yokoo