Gaudi is a one-star woodworking master hamster and architect living in Hoshihama, the City of Masters. He shares his home with his human owner Kaito, whom he regards as an elder brother. Driven by inspiration from his father Garnier and the legendary Master Superior, he relentlessly pursues the Grand Master title.

His personality radiates enthusiasm, optimism, and a fierce sense of justice. He tackles tasks with rapid agility yet frequently acts on impulse, creating unintended complications. Despite this, his passion compels him to aid humans in need as part of a secret team safeguarding hamster anonymity. His catchphrase, "Worker Hamster is born!", embodies his dynamic dedication to craftsmanship and problem-solving.

As a core team member, Gaudi partners with fellow hamsters Sylvie, Jean, Alec, and Steve. His clashes with Steve are especially volatile, sparking constant arguments due to their opposing methods. Through these collaborations, he evolves from a solo-focused artisan into a cooperative teammate, learning teamwork and responsibility. This growth unfolds through missions involving carpentry, rescues, and community events.

Family legacy fuels his ambitions, with his father as a key role model pushing him toward architectural and woodworking excellence. His journey features persistent challenges—refining skills under pressure or resolving team conflicts—highlighting perseverance, honed craftsmanship, and the reconciliation of individual drive with collective action.