Tadashi Yamabuki is the father of Inori Yamabuki (Cure Pine) and works as a veterinarian. He operates his own clinic in Yotsuba Town, residing there with his wife Naoko and daughter. Tadashi possesses tan skin, dark brown or grey eyes, and short dull brown hair, complemented by a mustache and thick beard. At work, he typically wears a yellow jumper under a white lab coat, dark grey trousers, and blue sandals.

His personality reflects patience, generosity, and deep care for the animals he treats. Within his family, Tadashi maintains a cheerful and kind demeanor, offering steadfast support upon learning of Inori's role as a Pretty Cure warrior. Professionally, his veterinary approach relies on keen observation and instinctive diagnosis of animal ailments, accounting for nuances like differences in pain perception between animals and humans. This method, combined with remaining calm and good-humored during hectic situations, fuels Inori's own aspiration to become a veterinarian.

Notable interactions include assisting Inori when she and the fairy Tarte swapped bodies due to a Labyrinth monster. Tadashi treated an injury on Inori's tail while she inhabited Tarte's body, lightheartedly remarking she'd become the animal she feared most. He also recounted the childhood experience causing her longstanding ferret phobia, contributing to her overcoming this fear. His supportive presence provides calmness and reliability in family life, forming a foundational element for Inori's personal growth and confidence.