Sven

He is a professor at the Royal Cross Hospital and holds the title of viscount. As an imperial court physician, he is renowned as the empire's leading doctor. Elise was under his care when she was a child. Deeply impressed by the splenectomy performed by Rose (Elise), he attempted to recruit her to the Royal Cross Hospital. However, upon learning that she was still an apprentice, he proposed that the three recommendations required for the medical licensing exam come from himself, Director Gothe, and Graham, thereby actively supporting Rose in obtaining her medical license.

During the birthday celebration, he was summoned to investigate issues regarding the tracheotomy Elise performed on the Duchess of Harbour. After his investigation, he reported to the emperor that the procedure had been flawlessly executed and requested an audience with Elise. At that time, he discovered that Elise and Rose were, in fact, the same person.