Diederich

An ally of the Phantomhive family. A German nobleman, Baron Weizsäcker.

A middle-aged man with a corpulent body. Despite his appearance, he is agile and helps Ciel and others escape from the German military in the "Witch's Curse" arc. As mentioned later, he was a classmate of Vincent and became his dormitory junior, a relationship that continues to make him an ally of the Phantomhive family. He also leads a very wealthy life as a German noble. Although his full-fledged appearance is in the "Witch's Curse" arc, he also appears in a minor role in the very early stages (Episode 3) and his student days are shown in a flashback in the "Boarding School" arc.

He was once the prefect of the Sapphire Owl dormitory at Weston College. Vincent, who was the prefect of the Emerald Lion dormitory, was his contemporary, and after losing to him in cricket, he became Vincent's servant. At that time, he was a slender and somewhat stiff young man. He also knew Ciel when he was a child, and was still thin at that time.