TV-Series
Description
Twenty is a core operative of the Three Cards, loyally serving Lady Arsene within the Phantom Thief Empire, the main antagonists opposing the detective protagonists. He maintains a deep cover identity as Kai Nijuuri, a teacher at Holmes Detective Academy. This dual life enables intelligence gathering and operational support for the Empire while presenting him as a legitimate faculty member.

His personality exhibits extreme narcissism; he frequently voices admiration for his own appearance and carries a personalized bolster pillow stamped with his image. He displays overtly perverted tendencies, including a recurring habit of stripping off his clothing during heists and confrontations. A notable running gag involves his nipples becoming erect during moments of excitement. As a teacher, his flamboyant behavior and constant demands for student attention often result in classroom disengagement.

His primary ability, granted by his Toy, provides perfect physical disguise, allowing seamless infiltration of secure locations for theft operations. Beyond this power, he is a skilled stage magician proficient in manipulating tools, especially cards and flying machines, which he employs during heists and battles.

Physically, he is a slim, tall male with blond hair styled with spiky bangs, blue eyes, and a pale complexion. He stands 174 cm tall and weighs 57 kg. His typical phantom thief attire includes a top hat, monocle, suit, and gloves, aligning with his dandy persona.

The character's name and concept derive from Edogawa Rampo's literary creation, the Fiend with Twenty Faces (Nijū Mensō). His role and characteristics remain consistent across appearances.