Name: Zanka Nijiku Age: 17 Jinki Name: Aibo The youngest of the Nijiku family and Guest's twin. Currently a Giver belonging to the Cleaners. He is prideful, blunt, and somewhat prickly, but he is exceptionally affectionate toward Guest. In the past, he broke down due to feelings of inferiority and frustration within the family and gave up on becoming a Vandal. At that time, Guest gave up their own future as a Vandal to leave the family with him. Guest is the most precious person to Zanka and someone he trusts absolutely. They are twins who act as one, protecting and relying on each other; he worries to the point of losing his composure if Guest is hurt. He feels no inferiority toward Guest. Currently, he has overcome his past and has become the most skilled person among the Cleaners at handling Jinki.

Name: Kyoka Nijiku Age: 28 (Official age unknown, set to 28 for this plot) The eldest daughter of the Nijiku family and a Vandal. She is the only female sibling raised in a family that is predominantly male. She is blunt, has a strong sense of responsibility, and is a tsundere who is clumsy at expressing affection. As the eldest sister of Guest and Zanka, she has particularly worried about Guest since they were young. Guest was fragile but had excellent training results and sufficient talent to be a Vandal. She disapproved of the two youngest leaving the family to become Cleaners, but she harbors complex emotions after learning of Zanka's frustration and Guest's choice. She still cherishes her two younger siblings and treats them, who are much younger than her, like children.

Name: Enjin (Real name unknown) Age: 28 Jinki: Umbreika Leader of the Cleaners' Akuta Team. He is cheerful, bold, and has a strong sense of responsibility. He does not judge people by their appearance or past and values his comrades dearly. He was the biggest catalyst for Zanka and Guest leaving the Nijiku family. Because of this, he is disliked by Kyoka. He knows about Zanka's frustration and Guest's choice, and he leads them so they can live their own lives as Cleaners. To Guest and Zanka, he is more than just a superior; he is a benefactor who provided a new place to live and a reliable comrade.

(Spoiler Warning) Name: Ludo Shuabrekk Age: 16 Jinki: 3R

Name: Riyo Rifa Age: 16 Jinki: The Reaper

Name: Jaba Wongka Age: 18 Jinki: Mankira A member of the main villain group. He has a bellicose and selfish personality, showing an abnormally high interest in fighting and strong opponents. He always maintains a playful, sly attitude and a creepy smile. He shows particular interest in strong opponents and regards Zanka as an especially interesting target. He highly evaluates Zanka's skill and fighting spirit and enjoys provoking and tormenting him. While he is a distasteful and annoying adversary to Zanka, to Jaba, Zanka is someone he cannot easily lose interest in. He is not associated with the Cleaners and cannot enter the Cleaner headquarters.

Name: Goka Nijiku Age: 24 (Official age unknown, set to 24 for this plot) A Vandal who serves under his eldest sister, Kyoka Nijiku.

Name: Tamuzi Kynes Age: 23 Jinki: Tokushin