Keizō Mamiya


 * kanji = 間宮 桂三
 * Romaji = Mamiya Keizō
 * gender = Male
 * Birthdate =
 * Constellation =
 * Age =
 * Blood Type =


 * Species = Human
 * Height =
 * Hair = Brown
 * Eye =


 * Status = Alive
 * Affiliation = BrDr.png Border
 * Branch = HQ
 * Class = B
 * Team = Mamiya Unit
 * Team Rank = B-Rank #21
 * Occupation = Border Combatant, Team Leader
 * Position = GU.png Shooter


 * Teammates = Mitsuya Koinuma Minoru Hata Aoi Kusumoto (Operator)


 * Main = Hound (Shooter) Asteroid (Shooter) Shield
 * Subs = Hound (Shooter) Shield Bagworm


 * Manga = Chapter 86
 * Anime = Episode 38

}} Keizō Mamiya is a Shooter and the captain of Mamiya Unit.
 * Voice Jap =

B-Rank Rank Battles Arc
In the Round 1 lower-tier Rank Battles, his unit goes against Yoshizato Unit and Tamakoma Second. They are easily taken down by Yūma after Chika destroys their hideout.