Trivia / Sleepy Princess in the Demon Castle

• All-Star Cast: The anime features some pretty hefty names such as Inori Minase, Yoshitsugu Matsuoka, Kaito Ishikawa, Hiro Shimono, and Saori Hayami, among others. It also features rising names such as Takeo Ōtsuka and Chikahiro Kobayashi.
• Meaningful Release Date: The final episode of the first season of the anime aired on December 21/22, 2020, which also happens to be Princess Syalis' birthday. The episode also happens to air the same week as Christmas (which serves as the setting for the episode) and the birthday of Succyun (who plays a key role in this episode).
• Official Fan-Submitted Content: An art contest for the series was held on Pixiv in 2020, and the winner of the grand award from the Demon Recruitment Division in Demon King Castle - the Castle's cleaning crew, magical mop lifeforms - was included in the manga with Chapter 240.
• Playing Against Type:
  • Kaito Ishikawa, who is far more well-known for his Hot-Blooded, Tsundere, or stoic characters, voices the de-facto Nice Guy Demon Cleric.
  • For the English dub, Christopher Wehkamp, who is more well-known for playing suave, deep-voiced adult men such as Ougai Mori and Miles Edgeworth, plays Hades with a significantly higher pitched voice more along the lines of Starscream or Psycrow.

---