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Sleepy Princess in the Demon Castle
Sleepy Princess in the Demon Castle
7.8•2020•U/A 16+•12 Episodes

Sshhh! Princess Syalis is trying to get a good night's sleep. Some shut-eye. Forty winks. Catch some Z's. Long ago in olden times when people and demons lived together in—well, disharmony, really—a demon king kidnaps a human princess and imprisons her in his castle. Bereft, the princess's subjects beat their chests in anguish…until a hero arises to spearhead Project Rescue Our Princess! While waiting for her knight in shining armor, what's an imprisoned princess to do...? Teddy-bear guards with bat wings are all very well, but her dungeon cell is bo-o-o-ring! So, she decides to wile away the long hours by sleeping. Now if only she could get comfortable…and didn't suffer from insomnia... (Source: VIZ Media)

Comedy|Fantasy|Slice of Life
Watch NowAnime

Characters

Aurora Suya Rhys Kaymin

Aurora Suya Rhys Kaymin

Maou Tasogare

Maou Tasogare

Akuma Shuudoushi

Akuma Shuudoushi

Haritoge Majiro

Haritoge Majiro

Yuusha Akatsuki

Yuusha Akatsuki

Debi Akuma

Debi Akuma

Red Siberian Kai

Red Siberian Kai

Yashiki Teshita Goblin

Yashiki Teshita Goblin

Frankenzombie

Frankenzombie

Neo Alraune

Neo Alraune

Poseidon

Poseidon

Minotaur

Minotaur

Kaen doku Ryuu

Kaen doku Ryuu

Obake Furoshiki

Obake Furoshiki

Nasu Azarashi

Nasu Azarashi

Harpy

Harpy

Scissor Magician

Scissor Magician

Alazif

Alazif

Joukyuu Gaikotsu-hei

Joukyuu Gaikotsu-hei

Futakubi Dragon

Futakubi Dragon

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Episodes

  1. 1

    Sleepless Princess of the Castle

    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.

    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.

    Play
  2. 2

    The Princess and Furious Fluff

    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.

    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.

    Play
  3. 3

    The Princess and Forbidden Knowledge

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

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

    Play
  4. 4

    The Princess, Destruction, and a Short Journey

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

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

    Play
  5. 5

    The Princess and Female Warriors

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

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

    Play
  6. 6

    The Princess’ Unwavering Choice

    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.

    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.

    Play
  7. 7

    Even More Sleepless Princess of the Castle

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

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

    Play
  8. 8

    The Princess and the Frightful Demon Nightmare

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

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

    Play
  9. 9

    The Princess and Hostage Training Week

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

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

    Play
  10. 10

    The Princess in Endopolis

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

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

    Play
  11. 11

    The Princess and Troubling Dreams

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

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

    Play
  12. 12

    Sleeping Princess of the Demon Castle

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

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

    Play