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Sleepy Princess in the Demon Castle poster

Sleepy Princess in the Demon Castle

2020 Animation, Comedy, Sci-Fi & Fantasy 1 season

TMDB rating 8.3/10 Ended

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.

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Seasons1

  • 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.

    All episodes available

    TMDB rating 6.4/10

This show also has specials. Specials never affect your progress, new seasons, or completion.

Cast and details

  • Inori MinasePrincess Syalis (voice)
  • Kaito IshikawaDemon Cleric (voice)
  • Yoshitsugu MatsuokaDemon King Tasogare (voice)
  • Hiro ShimonoThe Hero Akatsuki (voice)
  • Rikiya KoyamaMajiro the Hedgehog (voice)
  • Kouichi SoumaFrankenzombie (voice) / Ghost Wrapping Paper (voice)
  • Junichi SuwabeCaesar Magician (voice)
  • Shinya TakahashiGoblin Serf (voice)
  • Chikahiro KobayashiRed Siberian (voice)
  • Ayane SakuraAladdif (voice)
  • Sayaka OharaHarpy (voice)
  • Takeo OtsukaPoseidon (voice)
Network
TV Tokyo
First aired
Oct 6, 2020
Latest episode
Dec 22, 2020

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Release dates are original schedules and may differ from availability in your country. A release never marks anything as watched. Last checked Nov 2, 2026.Schedule data from TVmaze, CC BY-SA.