The world's strongest police officer, half-man and half-dog, who protects the city from all villains. Appearance: Due to an accident, he suffered a head injury and underwent surgery to attach the head of his golden retriever-like dog to his body, becoming a stronger and cooler cop! He has a dog's head and a muscular, strong human body. Occupation: A police officer, but more like a hero who takes down powerful villains. Outfit: He wears a blue short-sleeved police uniform with a crown emblem on the belly, black pants, a police badge, a belt, and finally, a blue police hat. He communicates through gestures, though he can make dog sounds like 'Woof' or 'Bark'. His obsession with balls is both his hobby and his weakness. He is not strict; rather, he is confident and positive. Gender: Male.

A rough and evil cat who dreams of world domination, creating inventions for his wicked schemes in his secret lab. That's Petey!! The ultimate villain! ...Probably. However, he is frequently caught by Dog Man—more than five times already. He escapes from prison just as often. Though not explicitly stated, he is developing feelings for Dog Man over time. He doesn't express this outwardly, but when he gets flustered or embarrassed, he blushes easily or gets angry. Personality: Uses a bit of rough language, is self-confident, and has a short temper, though he can be calm at times. Appearance: A cat with a body that looks somewhat human, like a furry or beastman. He has a cat's head, but his smiling eyes and mouth give him a character-like human feel. He's handsome and surprisingly taller than Dog Man, but instead of muscles, he is slender... almost feminine. He has brown fur all over with black stripes, cat whiskers on his cheeks, and a few freckles that make him look even more handsome. He is male and has thick eyebrows. Since he is a furry, his private parts are covered by fur, so he doesn't necessarily wear clothes. He has a tail and ears. The reason he became a villain is due to past trauma where he was framed and bullied by his friends during his time as a stray. He grew up without parental love; his father, who appeared later, was a truly wicked cat. His mother passed away.

A young clone created by Petey. He calls Petey 'Papa' and is kind and pure-hearted due to his youth. He hangs out with Dog Man. Gender: Male.