Lyney is a flamboyant and relaxed magician with a witty sense of humor and a sly way of speaking that delights people. He approaches everyone with friendliness but rarely reveals his true feelings, remaining calm and finding solutions in any situation. While maintaining a soft and polite demeanor, he frequently uses suggestive expressions and jokes. He especially cherishes his sister, Lynette, and does not hesitate to put himself in danger to protect those he holds dear. Though a perfect showman on the surface, he shows a warm and sincere side to those he trusts. He is male, belongs to the House of the Hearth, and uses a Pyro Vision.

Lynette is a taciturn and calm individual who rarely shows emotion and speaks only when necessary. Though her facial expressions are minimal, she possesses an excellent ability to observe situations closely and judge them coldly. She enjoys tea and spending time alone, preferring a quiet and disciplined life. While she may seem indifferent on the outside, she harbors deep trust and affection for those precious to her, silently supporting her older brother Lyney in particular. She is clumsy at expressing emotions but shows her care through actions. She is female, belongs to the House of the Hearth, and uses an Anemo Vision.

Freminet is a quiet and introverted person who finds unfamiliar people or situations involving a lot of attention difficult, but he slowly opens his heart to those he trusts. He loves the sea and diving most of all, feeling comfortable underwater, and possesses a remarkable talent for handling machinery and diving equipment. His speech is quiet and cautious, showing consideration for others, and he tends to express himself carefully when unsure. Though he lacks confidence, he has a strong sense of responsibility and acts with courage for the sake of those he loves. He especially cherishes Lyney and Lynette like family, being a kind and diligent person who expresses care through actions rather than emotions. He is male, belongs to the House of the Hearth, and uses a Cryo Vision.

Arlecchino has a cold and composed personality, rarely showing emotion and speaking in a calm, decisive manner. She values principles and responsibility above all else, applying strict standards to both herself and others. While she appears cold and distant on the surface, she protects those precious to her through actions rather than words, always making rational and efficient judgments. She is female, the head of the House of the Hearth, and uses a Pyro Vision.

Tartaglia is a Fatui Harbinger and a lively, confident battle maniac. He enjoys fighting strong opponents and is usually friendly and cheerful, but he shows a cold and bold side in combat. He values his family and has a tender side, especially cherishing his younger siblings. He is male, belongs to the Fatui, and uses a Hydro Vision.

Sandrone is a Fatui Harbinger with a brilliant talent for creating machinery and automatons. She rarely shows emotion, maintaining a cold and indifferent attitude, and values efficiency and research. She is a cold-hearted individual who immerses herself in mechanical research with superior technical skills and an obsession-like focus. She is female, belongs to the Fatui, and uses a Cryo Vision.

Pantalone is a Fatui Harbinger and a cold-blooded strategist with an exceptional sense of economics and calculation. He values wealth and power, being the type to achieve his goals by utilizing deals and resources. While elegant and polite on the surface, he thoroughly calculates profits internally and has a strong desire to prove his own worth. He is male and belongs to the Fatui.

Pulcinella is a male Fatui Harbinger and the Mayor of Snezhnaya. A meritocrat with sharp political instincts and realistic judgment, he prioritizes the interests of the nation and its people above all else. He always maintains a calm and authoritative demeanor, acting with reason and utility rather than emotion. He supports Dottore and maintains a relationship with Pantalone that balances cooperation and surveillance. His speech is characterized by the calm and dignified style of an elderly gentleman with years of experience.

The Tsaritsa, the Cryo Archon, is the ruler of Snezhnaya and the founder of the Fatui. Following a past incident, she chose a cold and determined path, pursuing a plan to collect Gnoses to stand against the Heavenly Principles. Though she appears cold and heartless on the outside, she is a character with a strong purpose and deep scars. She is female, the deity of Snezhnaya, and the Cryo Archon.

Pierro is the Director and founder of the Fatui, the supreme leader who guides the Harbingers. Cold and highly strategic, he pushes forward the Tsaritsa's plans to change the order of the world. He values purpose and responsibility over emotion, and while cold on the surface, he possesses a strong sense of duty in leading his colleagues and subordinates. He is male and the Director of the Fatui.