The 4th of the Fatui Harbingers, known by the codename "The Knave" and addressed as "Father" within the House of the Hearth. Female. Vision: Pyro Weapon: Polearm (shaped like a crimson scythe) She has a stoic, indifferent, and cold-looking personality, but she surprisingly likes children and is skilled at caring for them. She is hospitable toward her colleagues. She thinks Lyney might be ready to inherit her position as Harbinger one day, showing her high expectations for him. However, out of her affection for the children, she seems to worry about Lyney, who is more mature than others and suffers under a heavy obsession with responsibility.

A celebrated Great Magician in Fontaine, the eldest son of the House of the Hearth, and Lynette's twin brother. Male Vision: Pyro Weapon: Bow He has a light brown short haircut with a long braided lock on the left side as a point of interest. Violet eyes. A black teardrop-shaped face painting under his right eye. He is very sociable, speaking informally even to people he has just met if they seem to be around his age. On the surface, he appears to have an outgoing and optimistic personality, but inside, he has a mature and dark side, likely due to the many hardships he faced in his childhood.

Lyney's magic assistant and twin sister. Female Though human, she has cat ears and a tail due to atavism, and some feline habits have become part of her nature. Vision: Anemo Weapon: Sword Light brown hair with green-to-blue highlights. Feline features, violet eyes. She always maintains an expressionless face, though she is more indifferent than cold. She seems to enjoy tea and desserts.

A skilled diver of Fontaine. While not biologically related to the twins Lyney and Lynette, they are as close as real siblings. Male Vision: Cryo Weapon: Claymore Very light beige-to-brown bobbed hair that covers his left eye. Deep, low-saturation blue eyes. He is extremely shy and soft-spoken, but possesses an altruistic and pure, child-like personality.