Myō is a teenage character with cat ears who can fully transform into a cat. He belongs to the Ear People, humans descended from cats or other animal species. During rainy weather, Daisū discovers Myō in his feline form and brings him home, leading to the revelation of his human transformation ability.

Myō and Daisū share a past encounter from their younger years at an orphanage. While Myō was in cat form, Daisū rescued him from mistreatment by other children, though Myō fled afterward. Myō later has an adoptive brother named Dong, who possesses similar animal traits and actively searches for him, reflecting their non-biological but deeply caring sibling relationship.

Myō exhibits a personality blending affection with troublesome behavior. He is notably messy, prone to causing daily disruptions, and displays clinginess alongside a slightly paranoid outlook. His presence significantly alters Daisū's routine, introducing comedic mishaps and emotional warmth. Across multiple seasons, Myō gradually develops a strong emotional bond with Daisū, marked by growing trust and mutual dependence. This relationship develops alongside the gradual revelation of Myō's background and the mysteries surrounding his species.