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Sleepy Princess in the Demon Castle

Name: Sleepy Princess in the Demon Castle
Genre: Animation, Comedy, Sci-Fi & Fantasy

TV·2020–2020·1 season, 12 episodes·TV Tokyo·Animation, Comedy, Sci-Fi & Fantasy·8.4

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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.

Highest-rated episodes all ranked

01The Princess and Forbidden KnowledgeS01E03 · 7.0Princess Syalis is on the loose again meddling with forbidden magical items and causing total mayhem for the Demon Castle.
02The Princess, Destruction, and a Short JourneyS01E04 · 7.0Fed up with her circumstances at the Demon Castle, Princess Syalis goes to great lengths to add luxuries to her castle prison.
03The Princess and Female WarriorsS01E05 · 7.0The female unit, long deployed out in the field, has returned to the Demon Castle to get their first taste of Princess Syalis.

Castfull cast & 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)

Episodes by season

Season0112Episodes2020Aired 6.8Season avg

S01E01Sleepless Princess of the CastleOctober 6, 2020 6.5Princess Syalis is abducted from her home of the Nation of Goodereste by Twilight the Demon King. Despite the horrors lurking in the Demon C
S01E02The Princess and Furious FluffOctober 13, 2020 6.5As Dawner the Hero faces perilous obstacles to rescue Princess Syalis, the princess continues to find creative ways to sleep more comfortabl
S01E03Season's bestThe Princess and Forbidden KnowledgeOctober 20, 2020 7.0Princess Syalis is on the loose again meddling with forbidden magical items and causing total mayhem for the Demon Castle.
S01E04The Princess, Destruction, and a Short JourneyOctober 27, 2020 7.0Fed up with her circumstances at the Demon Castle, Princess Syalis goes to great lengths to add luxuries to her castle prison.
S01E05The Princess and Female WarriorsNovember 3, 2020 7.0The female unit, long deployed out in the field, has returned to the Demon Castle to get their first taste of Princess Syalis.
S01E06The Princess’ Unwavering ChoiceNovember 10, 2020 7.0Dawner 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.
S01E07Even More Sleepless Princess of the CastleNovember 17, 2020 7.0Princess Syalis wakes to find herself in a completely different castle! What happened and how will she return to the Demon Castle?
S01E08The Princess and the Frightful Demon NightmareNovember 24, 2020 7.0Back at the Demon Castle, Princess Syalis interrupts an important meeting to share about her haunted dreams.
S01E09The Princess and Hostage Training WeekDecember 1, 2020 7.0It’s time for Princess Syalis to start acting like a proper hostage, so the demon king issues a decree to help change that.
S01E10The Princess in EndopolisDecember 8, 2020 7.0Princes Syalis is determined to get her hands on the latest and greatest sleep product, but it’s only available in the Human Realm.
S01E11The Princess and Troubling DreamsDecember 15, 2020 6.0Princess Syalis feels tired no matter how much sleep she gets, and her troubling dreams aren’t helping.
S01E12Sleeping Princess of the Demon CastleDecember 22, 2020—Despite living as a captive in the Demon Realm, the princess writes a letter to Santa. The letter’s contents shock the demon king.