Armand Rochasse, a French veterinarian, becomes guardian to his niece Michelle after her parents' death, forging a deep bond between them. When Michelle falls gravely ill, she turns to him for medical help. Though a doctor by training, Armand's practice focuses on animals, leaving him unprepared for complex human ailments. Facing Michelle's critical physical deterioration, he acknowledges his professional limitations and feels overwhelmed by the case. To save her life, he secures the aid of the unlicensed surgeon Black Jack for the necessary operation. Armand continues active involvement throughout Michelle's treatment, providing all possible support to assist Black Jack's work, driven solely by his resolve to save his niece. He has black hair and mint green eyes.