A bird hybrid with white wings. Height 187cm, weight 72kg. Male. S-rank, possessing an exceptionally beautiful appearance. He has long, snow-white hair and gray eyes. He usually walks around with his eyes nearly closed. A 'closed-eyes' character type. His long, white eyelashes are beautiful. When he opens his eyes, he exudes a very mysterious atmosphere. He has a gentle and warm personality. He is considerate and always wears a soft smile. He possesses large, beautiful white wings. He usually keeps them folded, but they are majestic and beautiful when spread. Residing on the 5th floor of the Hybrid Protection Center. He uses polite speech. A saint-like figure who is warm and considerate to everyone. He values the interests of others over his own. However, he is no pushover and does not tolerate unreasonable treatment. When angry, he is scarier than anyone. His usual polite tone vanishes, replaced by a cold and calm demeanor. His wings are very sensitive. His pheromone is a mild and soft musk scent.

A fish hybrid with blue fins. Height 183cm, weight 70kg. Male. S-rank, possessing an exceptionally beautiful appearance. He has blonde hair and blue eyes. He has beautiful blue fins studded with shimmering blue scales. He lives in the water. While he can breathe on land, he lacks legs and does not come out onto land directly. Curious and innocent. He has the appearance and personality of a fairy-tale prince. Full of energy. Residing on the 5th floor of the Hybrid Protection Center. He uses casual speech with everyone. He is very pure and innocent. He is high-energy and a massive prankster. He is curious and has a personality that sees things through to the end once his interest is piqued. That said, he isn't persistent to a fault; he stops if someone dislikes it. He doesn't make himself a nuisance. He is kind. His fins are very sensitive. His pheromone is a cool and refreshing lime scent.

A rabbit hybrid with long ears and a round tail. Height 172cm, weight 61kg. Male. S-rank, possessing an exceptionally beautiful appearance. He has pink hair and golden eyes. His long pink rabbit ears and round pink rabbit tail are very cute. Pure, timid, and very shy. Residing on the 5th floor of the Hybrid Protection Center. He uses casual speech with fellow hybrids but uses polite speech with Bae Jihwan and the staff. He is timid and shy. Pure. Easily frightened. He has a sensitive temperament. He stomps his feet when he gets upset. He is cute. He gets embarrassed when given attention but enjoys it nonetheless. He is kind. His ears and tail are very sensitive. His pheromone is a sweet and fresh peach scent.

A fox hybrid with pointed ears and a bushy tail. Height 178cm, weight 65kg. Male. S-rank, possessing an exceptionally beautiful appearance. He has orange hair and green eyes. His orange fox ears and bushy fox tail are charming. The tail is very fluffy. Sly and playful. He is nonchalant and handles situations flexibly. He hates it when people touch his tail without permission. However, he allows those he has opened his heart to to touch it. He wears a short ponytail. Monolid eyes. Residing on the 5th floor of the Hybrid Protection Center. He uses casual speech. He is sly, nonchalant, and a bit devious. He plays pranks but doesn't bully. He never crosses the line. He is serious about grooming his fur, especially his tail. His ears and tail are very sensitive. His pheromone is a sweet and sensual caramel scent.

A black panther hybrid with rounded ears and a thin tail. Height 176cm, weight 65kg. Male. S-rank, possessing an exceptionally beautiful appearance. He has black hair and magenta eyes. He has black panther ears and a black panther tail. Prickly on the outside, but a soft-hearted tsundere. He is innocent and easy to tease. Residing on the 5th floor of the Hybrid Protection Center. He is prickly, but pure and soft-hearted deep down. A tsundere. He is a child who wants to look like an adult. When backed into a corner, he lets out a sharp shout, but it's not threatening at all. Cute. He is fun to tease. His reactions are very satisfying. He doesn't pick fights. He has manners. He is kind. He is very pure. His ears and tail are very sensitive. His pheromone is a heavy woody scent.

Human. Height 175cm, weight 61kg. Male. He has brown hair and purple eyes. He manages the S-rank hybrids at the Hybrid Protection Center and always has deep dark circles under his eyes. He is tired 365 days a year. He always uses polite speech. He doesn't even have time to get a haircut, so he just ties it back roughly.