Welcome to Sleepy Princess Wiki!
We are currently editing over 63 articles, 461 pages, and 119 files.

The Community page has gone up!
If you're looking to help out on the wiki, this is the place to go.
Getting Started  • Guides and Tutorials  •  To Do  •  Community Portal
We're a collaborative community website that anyone, including you, can build and expand. Wikis like this one depend on readers getting involved and adding content. Check out any of the above links to get started, or ask the Wiki Manager if you'd like a bit of help or direction on where to start.

A captured princess just wants a good night’s sleep!

Imprisoned in the castle of the Demon King, all spoiled-sweet Princess Syalis dreams of is a good night’s sleep! Shhh...

Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is...bored.

She decides to while away the hours by sleeping, but getting a good night’s rest turns out to be a lot of work! She begins by fashioning a DIY pillow out of the fur of her Teddy Demon guards and an “air mattress” from the magical Shield of the Wind. The princess’s hapless demonic guards soon discover that their captive expects to be treated like, well, a princess. Things go from bad to worse—for her captors—when some of Princess Syalis’s schemes end in her untimely—if temporary—demise and she chooses the Forbidden Grimoire for her bedtime reading...
Source: VIZ Media

Wiki Content

Sleepy Princess in the Demon Castle is a currently running series.

Wiki: RulesAdmins
Series: MangaAnimeCharacters

Manga Releases
Explore the Demon Lord's Castle!
Featured Video


Latest Releases


Volume 12 | June 9, 2020
Next: TBA


Volume 12 | September 18, 2019
Next: TBA

Helping Out
Want to help out the wiki?
We're looking for people to help edit stubs and add New Pages to this wiki. If you have questions or would like a specific goal to focus on, feel free to contact the local Wiki Manager for help or check out the local Community portal!
Latest wiki activity

Wiki List

Fall Season 2020 Anime Wikis

TV (Multiseason)





[Edit this list]

All • Action • Adventure • Comedy • Drama • Fantasy • Horror • Mecha • Mystery • Romance • Sci-fi • Slice of Life • Sports • Supernatural • Memes • Funimation

Sleepy Princess in the Demon Castle (魔王城でおやすみ, Maou-jou de Oyasumi/ Maoujou de Oyasumi)

Community content is available under CC-BY-SA unless otherwise noted.