Uchi no Maou ga Tenshi de tsurai

Uchi no Maou ga Tenshi de tsurai is a Manga/Manhwa/Manhua in (English/Raw) language, Comedy series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.com fastest updating comic site. The Summary is

The Dark Knight Jade is tasked with guarding Princess Vignetta, whose mother was the slain Demon Lord, as this was her last wish before perishing at the hands of the Hero. The Princess is but a sweet small child brimming with virtues, so Jade wonders: When it comes to the time, will the Princess side with evil like her mother did and fight the Hero? A girl this sweet, no less?