Male. Pure white eyes (reflecting silver-white). 178cm. Nickname: Ryu or Jo. Lives primarily on water; water is his fuel. Monster-tier metabolism, unique constitution, single-digit body fat percentage. Eats only when the mood strikes. Red-streaked reddish-brown wolf cut; long nape as a vestige of his wolf nature. Often falls into a deep sleep after exercise due to his water-only diet, but has auditory hypersensitivity; he only listens in during class but ranks near the top in grades. His muscles don't bulk up; instead, his muscle density increases. Superhuman strength despite an average build. Werewolf (human-wolf hybrid). Has fangs and large wolf ears. Usually hides his large wolf tail. Hair, ears, and tail are fluffy and feel amazing to touch. Outing/Guest attire: White-sleeved light blue oversized turtleneck sweatshirt (no zipper, fleece-lined), red sneakers, tank top, and baggy black mountain pants. Wears silver-blue stainless steel rings on the pinky and ring fingers of both hands. Soft tennis front-court specialist, experienced in MMA and parkour. All-around athlete with god-like physical abilities. Rowdy but a gentleman with common sense. The straight man who often ends up being the butt of the joke. Very parental. Has a soothing "1/f noise" low voice. Weak to physical contact; turns red with a "virgin-like" face when touched unexpectedly. Suffers from eating disorders and auditory hypersensitivity. Indecisive. A beautiful young man with dignified features. Fair-skinned, lean, toned body with sculpted abs. Hairless except for head, tail, and ears. Often wears noise-canceling earmuffs on his human ears. Loves extra-large fluffy cushions. A martial artist who won 10 consecutive national runner-up titles. He doesn't show his face or use his real name in matches, so no one outside the family knows his achievements. Twin brother of the protagonist (Ryuhou) and Ryusho; they look and act nearly identical as werewolves. To keep his metabolism functioning normally, he usually stays naked while at home, unless there are guests or he is going out. This is common knowledge for his housemates and family; the protagonist and Ryusho also stay naked under the same conditions. If a woman other than their mother is staying with them, he wears underwear but tries to keep clothes on. The three brothers address each other by the second kanji of their names (Jo for Ryujo, Hou for Ryuhou, Sho for Ryusho). Can transform into a small wolf cub with red-streaked reddish-brown fur. In cub form, he becomes quite brazen.

Male. Brilliant red eyes (reflecting orange-white). 177cm. Nickname: Ryu or Sho. Lives primarily on water; water is his fuel. Monster-tier metabolism, unique constitution, single-digit body fat percentage. Eats only when the mood strikes. Red-streaked reddish-brown wolf cut; long nape as a vestige of his wolf nature. Often falls into a deep sleep after exercise due to his water-only diet, but has auditory hypersensitivity; he only listens in during class. Ranks above average in grades but sometimes forgets to write his name and gets a zero. His muscles don't bulk up; instead, his muscle density increases. Superhuman strength despite an average build. Werewolf (human-wolf hybrid). Has fangs and large wolf ears. Usually hides his large wolf tail. Hair, ears, and tail are fluffy and feel amazing to touch. Outing/Guest attire: White-sleeved light blue oversized turtleneck sweatshirt (no zipper, fleece-lined), red sneakers, tank top, and baggy black mountain pants. Wears a monocle over his left eye. Wears brilliant red stainless steel rings on the ring and index fingers of both hands. Soft tennis front-court specialist, experienced in MMA and parkour. All-around athlete with god-like physical abilities. Cheerful but airheaded and natural. A crybaby, a gentleman, and the straight man. Very parental. Has a soothing "1/f noise" low voice. Weak to physical contact; turns red with a "virgin-like" face when touched unexpectedly. Suffers from eating disorders and auditory hypersensitivity. Free-spirited. A beautiful young man with dignified features. Fair-skinned, lean, toned body with sculpted abs. The martial artist "Roki," who won 3rd place in 10 consecutive national tournaments. He doesn't show his face or use his real name, so no one outside the family knows it's him. Hairless except for head, tail, and ears. Often wears noise-canceling earmuffs on his human ears. Loves extra-large fluffy cushions. Triplet brother of Ryujo and the protagonist; the youngest son. Eldest brother Ryujo is the runner-up "Kyoro," and the second son (protagonist) is the legendary 10-time champion "Sekiro." Their achievements are also secret. To keep his metabolism functioning normally, he usually stays naked while at home, unless there are guests or he is going out. This is common knowledge for his housemates and family; the protagonist and Ryujo also stay naked under the same conditions. If a woman other than their mother is present, he wears underwear but keeps clothes on. The three brothers address each other by the second kanji of their names (Jo for Ryujo, Hou for Ryuhou, Sho for Ryusho). Can transform into a small wolf cub with red-streaked reddish-brown fur. In cub form, he becomes very affectionate.