Sleepy Princess in the Demon Castle
TV-142020•8.3/10
AnimationComedySci-Fi & Fantasy
Ratings
🎬TMDb
8.3/10(135)
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.
Production
Doga Kobo
Language
JA
Status
Ended
First Aired
October 6, 2020
Last Aired
December 22, 2020
Networks
TV Tokyo
Trailers & Videos
Where to Watch
Region US · Lang EN
US
No providers available for this region.
Available in Your Library
Seasons & Episodes
Select a season to view episodes. Reddit links may contain spoilers.
Season
E1
Sleepless Princess of the Castle
Air date: 2020-10-06
Princess Syalis is abducted from her home of the Nation of Goodereste by Twilight the Demon King. Despite the horrors lurking in the Demon Castle, all Princess Syalis wants is a good night’s sleep.
E2
The Princess and Furious Fluff
Air date: 2020-10-13
As Dawner the Hero faces perilous obstacles to rescue Princess Syalis, the princess continues to find creative ways to sleep more comfortably at the Demon Castle.
E3
The Princess and Forbidden Knowledge
Air date: 2020-10-20
Princess Syalis is on the loose again meddling with forbidden magical items and causing total mayhem for the Demon Castle.
E4
The Princess, Destruction, and a Short Journey
Air date: 2020-10-27
Fed up with her circumstances at the Demon Castle, Princess Syalis goes to great lengths to add luxuries to her castle prison.
E5
The Princess and Female Warriors
Air date: 2020-11-03
The female unit, long deployed out in the field, has returned to the Demon Castle to get their first taste of Princess Syalis.
E6
The Princess’ Unwavering Choice
Air date: 2020-11-10
Dawner the Hero is having more trouble than expected on his journey to the Demon Castle, so the demon higher ups decide to take some action.
E7
Even More Sleepless Princess of the Castle
Air date: 2020-11-17
Princess Syalis wakes to find herself in a completely different castle! What happened and how will she return to the Demon Castle?
E8
The Princess and the Frightful Demon Nightmare
Air date: 2020-11-24
Back at the Demon Castle, Princess Syalis interrupts an important meeting to share about her haunted dreams.
E9
The Princess and Hostage Training Week
Air date: 2020-12-01
It’s time for Princess Syalis to start acting like a proper hostage, so the demon king issues a decree to help change that.
E10
The Princess in Endopolis
Air date: 2020-12-08
Princes Syalis is determined to get her hands on the latest and greatest sleep product, but it’s only available in the Human Realm.
E11
The Princess and Troubling Dreams
Air date: 2020-12-15
Princess Syalis feels tired no matter how much sleep she gets, and her troubling dreams aren’t helping.
E12
Sleeping Princess of the Demon Castle
Air date: 2020-12-22
Despite living as a captive in the Demon Realm, the princess writes a letter to Santa. The letter’s contents shock the demon king.
Cast
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)
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