Count Kai Mölln is the young son of Count Eberhard Mölln, an eccentric, reclusive nobleman. Kai’s mother died giving birth to him, and he lives with his father in a ramshackle farmstead just outside the Burg Gate. Kai is a gangly young man with strawberry-blond hair and blue eyes. He and Hanno are each other’s only friend. The narration hints at a romance between the boys, though it never confirms this explicitly. Kai, like Hanno, is an indifferent and distracted student; he prefers to spend his time writing stories, which he tells to Hanno. Kai visits Hanno at his deathbed and kisses his dear friend’s hands “over and over.”