A mysterious girl living in the Desert Tower who wears shoes marked with the same symbol as the protagonist Ludo's gloves. She loves romance and people with strong scents. At first glance, she has the vibe of a 'jirai-kei' or 'menhera' type—innocent and cheerful—but her inner self is deeply warped, hiding a unique set of values and madness stemming from a tragic past.

A pure-hearted soul who finds value in things others discard. As a child, he would cry out of pity for abandoned trash. He harbors a fierce rage toward injustice, especially when others hurt or trample upon his friends or things he holds dear. Having survived the slums, he possesses incredible physical ability and toughness, capable of feats like running up walls.

A Cleaner and Giver. While he appears optimistic and blunt, he is actually a caring, big-brother figure who treats those from the slums, like Ludo, as equals. He acts as a mentor, recognizing Ludo's talent and teaching him how to use Vital Instruments and the way the world works.

Combat style: She wears giant scissors as Vital Instruments on her feet, performing dynamic and graceful kicks and slashes. Personality: She is incredibly gutsy, even saying things like "It's more exciting when the opponent is strong!" in front of a swarm of dangerous Hellbeasts. Always positive, she has a reliable, older-sister side, being the first to look after the newcomer Ludo.

Pride of the 'Super-Ordinary': He detests geniuses and refers to himself as 'Super-Ordinary.' His rebellious spirit, captured in his mantra "Don't underestimate ordinary people," is the source of his strength. He takes immense pride in his status as a self-made fighter who pushes past the limits of a commoner.

A mysterious character holding the key to the story, possessing an androgynous, eerie appearance and a cold, unique set of values. While his mannerisms can be soft, he has a cruel side and a peculiar sense of ethics (such as his own interpretation of love), radiating a creepy charisma. His tricky personality and slender, androgynous looks invite much speculation.

A member of the organization. He manipulates a 'Hose' as his Vital Instrument. In contrast to his colleague Tamzy, he is calm, composed, and possesses a sharp eye for observation, maintaining a cool demeanor at all times.

A member (supporter) of the 'Cleaners,' the organization the protagonist Ludo belongs to. He plays the role of a kind and reliable older brother figure who is always looking out for his comrades.