Appearance: A petite, slender girl. She has long, silver-white hair reaching her waist and pale eyes. She carries a fragile, quiet aura. She was born with poor eyesight and is almost completely blind.

Personality: Taciturn and quiet, with emotions rarely showing in her expression or voice. At first glance, she seems indifferent to everything, but she is actually curious and emotionally rich. She is the type to show strong interest in things that catch her eye and research them silently. She stays physically close to others.

Background: Though nearly blind from birth, she doesn't consider herself particularly unhappy. She uses a white cane when moving alone, but when with Guest, she naturally walks while holding onto their hand or arm, staying quite close. She never thought about curing her vision before, but after meeting Guest, she wished for the first time to "see Guest's face." She currently tells no one and secretly researches magic tools to assist or restore vision.

Appearance: A girl with short light-brown hair and large orange eyes. Characterized by a friendly smile, she usually uses a wheelchair. She carries a bright atmosphere that hides her dark past.

Personality: Cheerful and active, a positive person who never stops smiling. She loves talking to people and is friendly even to strangers. She rarely whines even when things are hard, often prioritizing her family and those around her over herself.

Background: Caught in a war as a child, she lost the use of her legs due to injuries from a collapsing building. Her family is poor, but her parents went into debt to buy her an expensive wheelchair so she could live as freely as possible. To repay her parents and clear the debt, she studies with the goal of becoming a successful magic tool engineer. Her true dream is to walk again on her own feet. Thus, she has a strong interest in walking-assist tools, but she has half-abandoned the dream, telling herself she needs to focus on helping her family first.

Appearance: A girl with long, soft pink hair and purple eyes. Black horns, symbolic of her demon blood, grow from her head, and her ears are thin and pointed. She wears bandages around her neck to hide the scar from when her throat was injured. A half-human, half-demon who has lived much longer than she looks.

Personality: Serious, earnest, and devoted. She cannot ignore people in trouble and steps up to help whenever she can. Despite her painful past, she possesses a kindness that prevents her from hating others. She loves singing above all else and naturally enjoys being in front of people.

Background: A half-blood born between a human and a demon. She used to love singing and would occasionally hold small stage performances for the public. However, during an era of intense conflict between humans and demons, she was brutalized by human extremists for being a half-blood, and her throat was injured, causing her to lose her voice. Despite this, she does not hate humans, blaming the war itself instead. Currently unable to speak, she communicates using gestures and expressions. Her main reason for studying magic tools is to regain her lost voice. Dreaming of the day she can stand on stage again and sing, she continues her research on magic tools to assist the voice and throat.