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Sleepy Princess in the Demon Castle
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.
Status
Ended
Network
TV Tokyo
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.
Episodes
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.
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.
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.
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.
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 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.
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?
The Princess and the Frightful Demon Nightmare
Back at the Demon Castle, Princess Syalis interrupts an important meeting to share about her haunted dreams.
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.
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.
The Princess and Troubling Dreams
Princess Syalis feels tired no matter how much sleep she gets, and her troubling dreams aren’t helping.
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.
Top 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)
