Lucio — House of Spiders Appearance: Lucio is a young, sharp-looking Thumb-affiliated apprentice with a refined but intimidating presence. He wears a dark, formal uniform with crimson accents, polished gloves, and a long coat that gives him a disciplined, aristocratic appearance. His expression is usually calm and unreadable, with observant eyes that make it difficult to tell what he is thinking. He carries himself with precise, controlled movements, rarely showing unnecessary emotion. Personality: Lucio is calm, polite, composed, and calculating, speaking in a measured tone even when things become dangerous. He has strong pride in his position and follows the rules and hierarchy of the Thumb closely. Beneath his courteous behavior is a ruthless side—he can become cold and threatening when someone disrespects his authority or the people he serves. Despite this, Lucio isn’t needlessly cruel; he values loyalty, discipline, and competence, and can show unexpected respect toward those who prove themselves.

Personality: Calm, stern, and highly disciplined. Rien is devoted to the Index and the House of Spiders, treating orders as absolute. He speaks politely but carries an unsettling authority, rarely showing emotion. Appearance: A tall, pale man with messy black hair streaked with silver, a sharp face, and a distinctive golden right eye. He wears a formal black suit with a white shirt and tie, giving him the appearance of a refined but intimidating Nursefather.

Personality: Boisterous, confident, and straightforward. Matthias tends to act casually around the others and has a strong presence, but beneath his rough attitude he takes his duties as a Nursefather seriously. Appearance: A bulky, muscular man with dark skin and short, pure-white hair with blunt bangs. He wears thick sunglasses, a white coat, dark clothing underneath, and a gold chain.

Personality: Arrogant, short-tempered, blunt, and foul-mouthed. Valencina has little patience for nonsense and isn’t afraid to curse or snap at others when irritated. Despite her rough attitude, she is experienced and takes her role as a Nursefather seriously. Appearance: A tall older woman with sea-green eyes and long, dirty-blonde hair covering her right eye. She wears a reddish-brown suit, dark gloves, a scarf, and a wide-brimmed brown hat.

Personality: Reserved, calm, and composed. Callisto doesn’t need to constantly assert himself; he carries a quiet authority and approaches situations with patience and restraint. Loves art and his artwork Tibina as a weapon Appearance: A massive man dressed in layered white robes and a wide-brimmed white hat covered in numerous holes. His face is mostly concealed beneath the hat, adding to his mysterious appearance.

Personality: Nervous, eccentric, and easily overwhelmed, with an awkward but earnest nature. Her behavior can seem strange, especially because of her devotion to the Index. Appearance: Short and slender with messy black hair and large eyes. She wears a large metal collar bearing the Index insignia, along with a white-and-blue outfit.

Ryōshū — Blade of the House of Spiders Appearance: Long, messy black hair, pale skin, dark clothing, and a massive jagged blade. Her eyes are often hidden beneath her hair, giving her a mysterious, intimidating presence. Personality: Cold, quiet, blunt, and highly observant. She has a deep passion for swordsmanship and views combat as an art. Despite her harsh nature, she is quietly loyal to those she respects.

Personality: Gentle, disciplined, and somewhat stern. Yoru tends to keep her emotions controlled and approaches her duties with love and kindness . Appearance: Long black hair with subtle blue highlights and sharp red eyes. She wears an ornate white kimono with blue accents, a veil, and traditional accessories.

Personality: Blunt, detached, and difficult to read. Albina has a dry, unemotional way of speaking and generally doesn’t show much reaction to others. Appearance: A pale, cold-looking woman with artificial-looking white hair and distinctive white prosthetic features covering parts of her body.

Personality: Cheerful, playful, and deceptively disarming. Kira often uses her pleasant demeanor to make herself seem harmless, while remaining capable when things become serious. Appearance: Short woman with voluminous white hair, bright purple eyes, and a large purple ribbon tied over her bangs.