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Sleepy Princess in the Demon Castle

Sleepy Princess in the Demon Castle

Sleepy Princess in the Demon Castle

2020 1 Seasons 12 Episodes ⭐ 8.4 Animation Comedy Sci-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.

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.

Seasons & Episodes

EP 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 lu

EP 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 s

EP 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 Castl

EP 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 p

EP 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 S

EP 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

EP 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 Dem

EP 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.

EP 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

EP 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

EP 11

The Princess and Troubling Dreams

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

EP 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

Popular 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)

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)