Tega-chan is a mysterious creature inhabiting Teganuma, unaware of its own exact nature or species. Standing 77 centimeters tall and weighing 33 kilograms, it exhibits a generally easy-going, natural, and self-paced disposition. Despite this relaxed demeanor and unassuming appearance, it wields a sharp and critical tongue. The creature consistently wears distinctive black gloves. While its primary staple food remains unspecified, it frequently consumes sweets. Functioning as a local mascot, Tega-chan coexists and interacts with a group of middle school girls, enhancing the surreal and whimsical atmosphere of their everyday city life. Across multiple seasons and related media, it maintains this role without significant alterations to its fundamental origins, personality traits, or circumstances. Its background remains confined to its initial presentation as Teganuma's enigmatic resident.