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Sleepy Princess in the Demon Castle
Sleepy Princess in the Demon Castle

Sleepy Princess in the Demon Castle

★ 8.4•2020•1 Seasons•ANIME
AnimationComedySci-Fi & Fantasy

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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Top Cast

Inori Minase

Inori Minase

Princess Syalis (voice)

Kaito Ishikawa

Kaito Ishikawa

Demon Cleric (voice)

Yoshitsugu Matsuoka

Yoshitsugu Matsuoka

Demon King Tasogare (voice)

Hiro Shimono

Hiro Shimono

The Hero Akatsuki (voice)

Rikiya Koyama

Rikiya Koyama

Majiro the Hedgehog (voice)

Kouichi Souma

Kouichi Souma

Frankenzombie (voice) / Ghost Wrapping Paper (voice)

Episodes

Sleepless Princess of the Castle

1. Sleepless Princess of the Castle

24m

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.

Aired: 10/6/2020
The Princess and Furious Fluff

2. The Princess and Furious Fluff

24m

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.

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Reviews (0)

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Junichi Suwabe

Junichi Suwabe

Caesar Magician (voice)

Shinya Takahashi

Shinya Takahashi

Goblin Serf (voice)

Chikahiro Kobayashi

Chikahiro Kobayashi

Red Siberian (voice)

Sayaka Ohara

Sayaka Ohara

Harpy (voice)

Ayane Sakura

Ayane Sakura

Aladdif (voice)

Takeo Otsuka

Takeo Otsuka

Poseidon (voice)

Masashi Yamane

Masashi Yamane

Minotauro (voice)

Takaya Kuroda

Takaya Kuroda

Flame Poison Dragon (voice)

Sayaka Ohara

Sayaka Ohara

Neo Alraune (voice)

Aired: 10/13/2020
The Princess and Forbidden Knowledge

3. The Princess and Forbidden Knowledge

24m

Princess Syalis is on the loose again meddling with forbidden magical items and causing total mayhem for the Demon Castle.

Aired: 10/20/2020
The Princess, Destruction, and a Short Journey

4. The Princess, Destruction, and a Short Journey

24m

Fed up with her circumstances at the Demon Castle, Princess Syalis goes to great lengths to add luxuries to her castle prison.

Aired: 10/27/2020
The Princess and Female Warriors

5. The Princess and Female Warriors

24m

The female unit, long deployed out in the field, has returned to the Demon Castle to get their first taste of Princess Syalis.

Aired: 11/3/2020
The Princess’ Unwavering Choice

6. The Princess’ Unwavering Choice

24m

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.

Aired: 11/10/2020
Even More Sleepless Princess of the Castle

7. Even More Sleepless Princess of the Castle

24m

Princess Syalis wakes to find herself in a completely different castle! What happened and how will she return to the Demon Castle?

Aired: 11/17/2020
The Princess and the Frightful Demon Nightmare

8. The Princess and the Frightful Demon Nightmare

24m

Back at the Demon Castle, Princess Syalis interrupts an important meeting to share about her haunted dreams.

Aired: 11/24/2020
The Princess and Hostage Training Week

9. The Princess and Hostage Training Week

24m

It’s time for Princess Syalis to start acting like a proper hostage, so the demon king issues a decree to help change that.

Aired: 12/1/2020
The Princess in Endopolis

10. The Princess in Endopolis

24m

Princes Syalis is determined to get her hands on the latest and greatest sleep product, but it’s only available in the Human Realm.

Aired: 12/8/2020
The Princess and Troubling Dreams

11. The Princess and Troubling Dreams

24m

Princess Syalis feels tired no matter how much sleep she gets, and her troubling dreams aren’t helping.

Aired: 12/15/2020
Sleeping Princess of the Demon Castle

12. Sleeping Princess of the Demon Castle

24m

Despite living as a captive in the Demon Realm, the princess writes a letter to Santa. The letter’s contents shock the demon king.

Aired: 12/22/2020