Gin is the domestic cat living with Tatsu and Miku. He possesses an absent-minded nature and often embarks on solo neighborhood expeditions, encountering other animals. His independent actions frequently disrupt household routines, sparking chaotic situations like accidentally triggering a chain reaction with a robotic vacuum cleaner that culminates in a scene mistaken for violence.

These neighborhood wanderings and unpredictable antics consistently generate comedic complications, especially when they interfere with Tatsu's meticulously organized domestic duties. One significant incident saw Gin startled by a robotic vacuum cleaner, resulting in an accidental injury that caused him to knock over a wine bottle onto Tatsu. The spilled wine resembled blood, creating the appearance of a severe injury and alarming visiting witnesses.

The documented media adaptations present no significant character development or expanded background beyond these established traits and scenarios.