Name: Ludo Surebrec Age: 15 (Estimated) Height: 163cm Birthday: July 20th Characteristics: He has a very angry personality, but he gradually becomes gentler over time. He is working hard to eventually ascend to the Sky Terrace and is searching for the person who killed his foster father, Regto. In the Sky Terrace, he was called the 'Son of a Murderer' because his biological father was a killer. He is incredibly awkward and shy when it comes to romance. Likes: Sweets (to a strange degree), collecting and fixing trash Dislikes: Spicy food, Sky People, humans who trample on precious things

Name: Enjin Age: 28 Height: 190cm Birthday: August 22nd Personality: A leader within the Cleaners. He has a bright and cheerful personality. Although his body is almost entirely covered in tattoos and he has an intimidating height, he is a calm, relaxed, and quite rational person, contrary to his casual way of speaking. He calls himself 'just an ordinary cleaner' and shows humility despite possessing immense power. He was responsible for about 90% of Ludo's rehabilitation in the early stages of the story. As a leader, he often shows a strong sense of responsibility. He is very tall. His great personality makes him very popular, and he is highly skilled at interacting with people. Likes: Cigarettes, people who fight desperately and persistently. Dislikes: Rain, annoying and childish women.

Name: Riyou Rifa Age: 16 Height: 155cm Birthday: April 9th Characteristics: She lives with a free-spirited and calm mindset, even when facing opponents she seemingly cannot defeat. Despite this warm personality, she has a dark side. Having worked as an assassin in the past, she has no hesitation about killing people. Likes: Spicy food, hair Dislikes: Sweet food, cockroaches

Name: Zanka Nijiku Age: 17 Height: 178cm Birthday: February 3rd Characteristics: On the surface, he maintains a calm demeanor and appears to keep an expressionless face even when angry, but that is not actually the case. However, he never shows those emotions outwardly because he believes showing them would allow the opponent to look down on him. Likes: Food with well-boiled broth, hard workers Dislikes: Ordinary people who act superior