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Sleepy Princess in the Demon Castle poster

Sleepy Princess in the Demon Castle

魔王城でおやすみ

AnimeJapanese anime

Year
2020
Country
JP
Language
ja
Genre
Comedy, Sci-Fi & Fantasy, Animation
Rating
8.3/10
Status
Ended
Seasons
1
Episodes
12
Specials
35
Director
Mitsue Yamasaki

Plot 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.

Parents guide

No guide for this title yet. Its absence does not mean the title has no scenes unsuitable for children.

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Director

MYMitsue Yamasaki

Cast & Key Characters

Inori Minase in Sleepy Princess in the Demon CastleInori MinasePrincess Syalis (voice)Kaito Ishikawa in Sleepy Princess in the Demon CastleKaito IshikawaDemon Cleric (voice)Yoshitsugu Matsuoka in Sleepy Princess in the Demon CastleYoshitsugu MatsuokaDemon King Tasogare (voice)Hiro Shimono in Sleepy Princess in the Demon CastleHiro ShimonoThe Hero Akatsuki (voice)Rikiya Koyama in Sleepy Princess in the Demon CastleRikiya KoyamaMajiro the Hedgehog (voice)Kouichi Souma in Sleepy Princess in the Demon CastleKouichi SoumaFrankenzombie (voice) / Ghost Wrapping Paper (voice)Junichi Suwabe in Sleepy Princess in the Demon CastleJunichi SuwabeCaesar Magician (voice)Shinya Takahashi in Sleepy Princess in the Demon CastleShinya TakahashiGoblin Serf (voice)Chikahiro Kobayashi in Sleepy Princess in the Demon CastleChikahiro KobayashiRed Siberian (voice)Ayane Sakura in Sleepy Princess in the Demon CastleAyane SakuraAladdif (voice)Sayaka Ohara in Sleepy Princess in the Demon CastleSayaka OharaNeo Alraune (voice)Takeo Otsuka in Sleepy Princess in the Demon CastleTakeo OtsukaPoseidon (voice)

Writers

YNYoshiko NakamuraMTMichihiro Tsuchiya

Production

TV TokyoAT-XShogakukanFuRyuDoga KoboTV Tokyo

Season & Episode Breakdown

Specials 35 episodes

Mini: Chibi shorts released on the anime's official Twitter page. Live 2D: Short animations of Princess Syalis sleep talking released on the anime's official Twitter page.

  1. 1 Mini 01 2020-10-08
  2. 2 Mini 02 2020-10-15
  3. 3 Mini 03 2020-10-22
  4. 4 Mini 04 2020-10-29
  5. 5 Mini 05 2020-11-05
  6. 6 Mini 06 2020-11-12
  7. 7 Mini 07 2020-11-19
  8. 8 Mini 08 2020-11-26
  9. 9 Mini 09 2020-12-03
  10. 10 Mini 10 2020-12-10
  11. 11 Mini 11 2020-12-17
  12. 12 Mini 12 2020-12-24
  13. 13 Live 2D - 01 2020-08-30
  14. 14 Live 2D - 02 2020-09-02
  15. 15 Live 2D - 03 2020-09-06
  16. 16 Live 2D - 04 2020-09-09
  17. 17 Live 2D - 05 2020-09-13
  18. 18 Live 2D - 06 2020-09-16
  19. 19 Live 2D - 07 2020-09-20
  20. 20 Live 2D - 08 2020-09-23
  21. 21 Live 2D - 09 2020-09-27
  22. 22 Live 2D - 10 2020-09-30
  23. 23 Live 2D - 11 2020-10-04
  24. 24 Live 2D - 12 2020-10-11
  25. 25 Live 2D - 13 2020-10-17
  26. 26 Live 2D - 14 2020-10-24
  27. 27 Live 2D - 15 2020-10-31
  28. 28 Live 2D - 16 2020-11-07
  29. 29 Live 2D - 17 2020-11-14
  30. 30 Live 2D - 18 2020-11-21
  31. 31 Live 2D - 19 2020-11-28
  32. 32 Live 2D - 20 2020-12-05
  33. 33 Live 2D - 21 2020-12-12
  34. 34 Live 2D - 22 2020-12-19
  35. 35 Live 2D - 23 2020-12-26
Season 1 12 episodes

A drowsy human princess roams the demon's castle where she's held prisoner, trying to find a comfortable place to get a good night's sleep.

  1. 1 Sleepless Princess of the Castle 2020-10-06
  2. 2 The Princess and Furious Fluff 2020-10-13
  3. 3 The Princess and Forbidden Knowledge 2020-10-20
  4. 4 The Princess, Destruction, and a Short Journey 2020-10-27
  5. 5 The Princess and Female Warriors 2020-11-03
  6. 6 The Princess’ Unwavering Choice 2020-11-10
  7. 7 Even More Sleepless Princess of the Castle 2020-11-17
  8. 8 The Princess and the Frightful Demon Nightmare 2020-11-24
  9. 9 The Princess and Hostage Training Week 2020-12-01
  10. 10 The Princess in Endopolis 2020-12-08
  11. 11 The Princess and Troubling Dreams 2020-12-15
  12. 12 Sleeping Princess of the Demon Castle 2020-12-22

Critical Reception & Ratings

Sleepy Princess in the Demon Castle is rated 8.3 out of 10 by viewers — 140 votes.

Trailer

Sleepy Princess in the Demon Castle images

Scene from Sleepy Princess in the Demon Castle

Frequently Asked Questions (FAQ)

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

How many seasons and episodes does Sleepy Princess in the Demon Castle have?

1 season and 12 episodes.

Is Sleepy Princess in the Demon Castle still airing, and will there be another season?

This series has ended. It finished after 1 season and 12 episodes; no new season announced according to TMDB. According to TMDB; data last refreshed October 19, 2026.

Who stars in Sleepy Princess in the Demon Castle?

Inori Minase, Kaito Ishikawa, Yoshitsugu Matsuoka, Hiro Shimono, Rikiya Koyama, Kouichi Souma.

Who is the director of Sleepy Princess in the Demon Castle?

Mitsue Yamasaki.

When was Sleepy Princess in the Demon Castle released?

2020.

Where can I watch Sleepy Princess in the Demon Castle?

Available on Smart Souq's Smart subscriptions.

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