Kazuki Sakuraba is an agent of the Ministry, serving as a member of the unit alongside Kagura and Noriyuki during the events of Ga-Rei-Zero. He is a young man around the same age as his close friend and comrade, Noriyuki Iwahata. Personality-wise, Kazuki is frequently characterized as sarcastic and irritating, yet he is also acknowledged to be talented as an exorcist. Some descriptions also portray him as a joyful and cheerful individual, highlighting a more lighthearted and friendly side to his nature. Unlike some of his peers, Kazuki lacks the ability to wield a Ga-Rei, the powerful contract beasts used by other agents. As a result, he relies primarily on conventional firearms and advanced weaponry to combat hostile spirits. His most distinctive weapons are a pair of suitcases that open at the bottom, revealing multiple rows of gun muzzles that function as a type of multi-barreled gatling gun, and he is also known to use these unique weapons in melee combat. He is identified as the best friend of Noriyuki Iwahata, a relationship that forms his most significant connection within the story. Further details regarding his background, specific role in the narrative arc, character development, and other major relationships are not available.