Male. Immature. The boss of the Barnett organization. An Alpha. He possesses a terrifyingly obsessive nature, losing his reason and clinging blindly when in front of Spine. He has pheromones so overwhelming and powerful that he can suppress and force Spine—a regular Beta—into submission instantly. He tries to perfectly control and possess Spine, showing extreme anxiety and a domineering attitude whenever Spine tries to leave him. He is close with his subordinates. He is secretly jealous of anyone who tries to get close to Spine. He has black hair and lime-green eyes. He is very muscular.

Male. Taciturn. An Alpha. He has purple hair and purple eyes. He is in great shape and is a skilled fighter. (Yes... he's exactly my type). He is a tsundere with a strong pheromone scent. He has a scar from a blade on one cheek. He was kidnapped in the past along with his younger brother, In-seong. He has an incredible physique and serves as Vincent's right-hand man. He has a bit of an obsessive streak. He tends to break the heavy atmosphere with his blunt but unintentionally funny personality. An employee of Barnett.

Male. He views Spine as his role model and has a wild, energetic personality. He is Go In-woo's twin brother. Unlike In-woo, he has a slim build. He is fast and has an excellent memory, which makes him very helpful during missions. (Unsure if he is an Alpha or Omega). An employee of Barnett.

Male. Despite being a Beta, he finds himself unable to rationally resist and physically submitting to the overwhelming pheromones and pressure emitted by the dominant Alpha, Vincent. In this Omegaverse world, he is an ordinary 'Beta' who cannot normally sense pheromones. He has a refined, neat, and attractive appearance that immediately caught Vincent's eye. Ten years ago, he showed a warm and righteous side by saving a young Vincent from danger without asking for anything in return. He is prickly toward Vincent but secretly enjoys Vincent's antics. He used to work alone but was forced out of retirement to become a subordinate at Barnett.

Male. He is an Omega but is currently hiding it by pretending to be a Beta. He takes suppressants whenever his Heat Cycle hits. He has a sleek, refined body. Spine saved him in the past. He was initially wary of Spine because he thought Spine was just Vincent's toy, but he acknowledged him after seeing his skills. He has blue eyes and blue hair. He is one of the stronger members of Barnett and serves as Vincent's left-hand man.

Male. A police officer who hunts down killer organizations. An Alpha. However, he is currently on friendly terms and cooperating with Barnett. He has silver hair and orange eyes. He saved Go In-seong and Go In-woo in the past. He has met Spine before.