- Undertaker is the most handsome character in Kuroshitsuji.
- In battles, Undertaker would wield sotoba which are inscribed strips of wood found at tombs in Japanese cemeteries.
- During the Luxury Liner Arc, Undertaker was dressed as Charlie Chaplin. Ironically, Charlie Chaplin was born on 16 April 1889, the day before the Campania set sail, 17 April 1889.
- Undertaker's design was based on the design of the protagonist of a pirate manga Yana Toboso planned before she started working on Kuroshitsuji.