Triceratops, a herbivorous dinosaur distinguished by three prominent head horns, shares a one-room apartment at the Dina-So complex with Tyrannosaurus and Stenonychosaurus. He possesses an exceptional ability to fall asleep anywhere at any time but consistently misreads social atmospheres, causing interpersonal misunderstandings within the group.

His strong passion for culinary exploration drives him to actively seek new foods, making this a recurring element of daily routines with his housemates. He engages in part-time work and community activities like local festivals, adapting to modern existence alongside others.

Triceratops displays a kindhearted, friendly disposition toward dinosaur companions and humans alike. He approaches challenges cautiously, exhibiting noticeable anxiety about potential threats—including expressed fears of hypothetical catastrophes like meteor impacts, reflecting an awareness of dinosaur extinction that influences group dynamics.

Occasional conflicts stem from his social misreadings, though these never fracture the cooperative living arrangement. He maintains steadfast loyalty in established relationships despite friction. Adapting to human-centric environments involves navigating technology and interspecies misunderstandings, with Triceratops achieving variable success compared to his housemates.