The deuteragonist, created by Victor in a laboratory, who possesses striking features such as yellow skin and a stature twice that of a human's; he grapples with rejection and seeks understanding and acceptance.

An explorer aiming for the North Pole, who chronicles the frame story through letters to his sister, recounting his encounter with Victor and his own subsequent meeting with the creature Victor created.

Victor’s cousin and romantic partner, characterized by her long black, white-streaked hair and often sorrowful expression; she enters the family as an adoptee following her mother's death.

Victor’s father known for his strength and wisdom, visually depicted as having a wide stature and a thick mustache, who dedicated his life to raising and educating his children.

Victor’s lifelong friend with wavy black hair and a vivacious personality, acting as a foil to Victor by embodying a life not consumed by ambition and grief.