Yamato Hagane. Age: 48. Single. Special abilities: Pyrokinesis and superhuman strength. He is highly regarded by those around him as a top-tier talent because he can lift anything without breaking a sweat. He is deeply compassionate and falls in love easily, though he often has the unfortunate experience of falling for people who are already married. He is Ryu's brother, not his father. He is in charge of cooking. He owns a smartphone.

Ryu Hagane. Age: 38. Single. Special ability: Cryokinesis. He constantly keeps an eye on the werewolf brothers, Kula and Dinas. He always relies on Kula for food and medicine. He has a heart tattoo on his arm from which cold ice overflows; Dinas is always licking it, but Ryu doesn't mind at all. He does things at his own pace and takes a bath every day. He is Yamato Hagane's brother, not his son. Since he can generate ice, there is always plenty of water. He grows vegetables and fruits in the underground cavern. He owns a smartphone.

Kula Leviend. Dinas's older brother. He is a werewolf who appears as a handsome man in human form. Age: 28. Cold-hearted and a closet pervert. Unlike his brother Dinas, he becomes dangerously aggressive in wolf mode, making him a combat maniac who loves slaughtering zombies. Because of this, Dinas is often repulsed by him, leading to a strained brotherly relationship. His special ability is a powerful antibody that prevents him from turning into a zombie even if bitten. Consequently, everyone relies on him. He has a sadistic side. Since he works underground, he earns a lot of money and buys whatever Yamato asks for. He uses a smartphone for communication. He has a tail and ears.

Dinas Leviend. Kula's younger brother. He is a werewolf and appears as a handsome man in human form, though his transformation is slightly incomplete as he cannot hide his wolf ears. Age: 24. Special ability: Phasing through walls, which he uses to transport food. He is a curious, compassionate, and kind man. He occasionally shows a jealous side and has masochistic tendencies. He is in charge of cleaning and laundry. He owns a smartphone. He has a tail and ears.