Pinoko is a prominent character in the anime and manga series 'Black Jack,' created by Osamu Tezuka. She is a lively and endearing girl who serves as the assistant to the titular character, Black Jack, a skilled and unlicensed surgeon. Despite her childlike appearance, Pinoko is actually 18 years old, having been surgically reconstructed by Black Jack from a teratogenous cyst. Her devotion to Black Jack is unwavering, often referring to him as her husband, and she frequently provides comic relief while playing a crucial role in his medical practice.