Sleepy Princess in the Demon Castle
Series Overview
When young Princess Syalis is kidnapped and imprisoned by the Demon King, she's rather indifferent about her situation. But she quickly comes to a terrible realisation—she can't sleep soundly in such an uncomfortable bed! She soon escapes her cell and sets off in search of ways to improve her sleep quality, leaving the castle's inhabitants, and even the Demon King himself, scrambling to keep the unruly princess out of trouble during her chaotic adventures.
Broadcast Schedule & Network Information
Airing status, episode counts, upcoming schedule, and network syndication.
1 Season • 12 Episodes
2020 – 2020
Premiered: Tue, Oct 6, 2020
Creative Production Team
Latest Aired Episode
Season 1, Episode 12: “Sleeping Princess of the Demon Castle”
Despite living as a captive in the Demon Realm, the princess writes a letter to Santa. The letter’s contents shock the demon king.
Seasons & Episodes Breakdown
Trailers, Teasers & Extra Featurettes
Official promotional previews, behind-the-scenes footage, and exclusive clips.
Sleepy Princess In The Demon Castle Official TrailerOfficial
Type: Trailer • Published 2020-10-04
Cast & Creators
Explore Star Directory →
Inori Minase
Princess Syalis (voice)
Kaito Ishikawa
Demon Cleric (voice)
Yoshitsugu Matsuoka
Demon King Tasogare (voice)
Hiro Shimono
The Hero Akatsuki (voice)
Rikiya Koyama
Majiro the Hedgehog (voice)
Kouichi Souma
Frankenzombie (voice) / Ghost Wrapping Paper (voice)
Junichi Suwabe
Caesar Magician (voice)
Shinya Takahashi
Goblin Serf (voice)
Chikahiro Kobayashi
Red Siberian (voice)
Sayaka Ohara
Harpy (voice)
Ayane Sakura
Aladdif (voice)
Takeo Otsuka
Poseidon (voice)
Masashi Yamane
Minotauro (voice)
Takaya Kuroda
Flame Poison Dragon (voice)
Sayaka Ohara
Neo Alraune (voice)
Shin-ichiro Miki
Hypnos (voice)
Kisho Taniyama
Hades (voice)
Creative Leadership & Key Crew
Mitsue Yamasaki
Yoshiko Nakamura
Yukari Hashimoto
Kunihiko Ito
Mutsumi Takemiya
Daijiro Morita, Kaoru Wada, Yoshikazu Beniya, Aya Iizuka, Mikito Bizenjima
Department Leadership Roster
Mutsumi Takemiya
Editor
Kunihiko Ito
Director of Photography
Daijiro Morita
Producer
Kaoru Wada
Producer
Yoshikazu Beniya
Producer
Aya Iizuka
Producer
Mikito Bizenjima
Producer
Hajime Kamata
Producer
Ryutaro Usukura
Producer
Souji Miyagi
Producer
Yusuke Ueno
Producer
Norio Fukui
Producer
Yukari Hashimoto
Original Music Composer
Age Classification & Content Advisories
Official viewer rating standards and content warnings across international classification boards.
TV-14: Parents Strongly Cautioned — Contains material unsuitable for children under 14.
International Certification Matrix
Parents Strongly Cautioned — Contains material unsuitable for children under 14.
14+ Parents Strongly Cautioned.
Mature — Recommended for viewers 15 and older.
Interdit aux moins de 12 ans — 12+ only.
Production Stills & Gallery
Official cinematic photography and background stills for Sleepy Princess in the Demon Castle.
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Frequently Asked Questions About Sleepy Princess in the Demon Castle
Key facts, seasons breakdown, and credits for search engines and AI assistants.
What is Sleepy Princess in the Demon Castle about?
When young Princess Syalis is kidnapped and imprisoned by the Demon King, she's rather indifferent about her situation. But she quickly comes to a terrible realisation—she can't sleep soundly in such an uncomfortable bed! She soon escapes her cell and sets off in search of ways to improve her sleep quality, leaving the castle's inhabitants, and even the Demon King himself, scrambling to keep the unruly princess out of trouble during her chaotic adventures.
How many seasons does Sleepy Princess in the Demon Castle have?
Sleepy Princess in the Demon Castle comprises 1 season available to explore.
Who stars in Sleepy Princess in the Demon Castle?
Key cast members in Sleepy Princess in the Demon Castle include Inori Minase, Kaito Ishikawa, Yoshitsugu Matsuoka, Hiro Shimono, Rikiya Koyama.
Who created or directed Sleepy Princess in the Demon Castle?
Sleepy Princess in the Demon Castle was developed and directed by Mitsue Yamasaki.