Dorarinho energizes The Doraemons as their mood-maker, radiating an energetic, optimistic, and carefree spirit that diffuses tension. His naïveté and impulsive nature frequently plunge tasks into chaos, embodying "haste makes waste," yet his pure heart and relentless positivity always lift the team. Extreme forgetfulness causes him to lose track of events within moments, and he harbors a distinct fear of the occult.

As a Brazilian robotic cat, he shines in football (soccer), serving as both ace forward and coach for an unnamed club alongside his best friend Nobinho. His remarkable speed and agility enable spectacular feats, like scoring goals from across the field. His appearance features a green body, white irises, and yellow cheek lines instead of whiskers. He typically wears an orange football uniform marked with a red "B," a red collar sporting a small soccer ball, and red wristbands.

He carries 11 identical Mini-Doras, small robotic assistants aiding his missions and often amplifying comedic chaos. Like other Doraemons, he accesses gadgets from a fourth-dimensional pocket, sometimes retrieving them impulsively at critical junctures. He favors dorayaki loaded heavily with Tabasco sauce.

His origin lies in the Robot School, where he and six other "mischievous" robots united to rescue classmates Sunekuchi and Jaides, forming The Doraemons. This act cemented their friendship and ongoing collaboration against threats using Friendship Telecards. Within the team, he shares a particularly close bond with Dora Med III, who occasionally acts as his babysitter, and maintains steadfast loyalty to all members despite his eccentricities.