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.
Seasons & Episodes
Season 1
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.
Key Information
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Cast & Crew
Sayaka Ohara
Neo Alraune (voice)
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)
Ayane Sakura
Aladdif (voice)
Takeo Otsuka
Poseidon (voice)
Frequently Asked Questions
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...
Sleepy Princess in the Demon Castle has 1 season with 12 episodes.
Sleepy Princess in the Demon Castle premiered on October 6, 2020.
No, Sleepy Princess in the Demon Castle has ended. The final episode aired on December 22, 2020.
Sleepy Princess in the Demon Castle originally aired on TV Tokyo. Check your local streaming services for availability.
Sleepy Princess in the Demon Castle has a rating of 8.4/10 based on user reviews.
Sleepy Princess in the Demon Castle is classified as Animation, Comedy, Sci-Fi & Fantasy.