LULW_Threnody
This is a derivative point of view of the story "Unsightly Gluttony." This is in no way, shape, or form canonical nor is it meant to be an extension of the aforementioned work. Also, I do NOT own any of the characters or the novel Unsightly Gluttony. I just really like it, lulw.
Rei, the up and coming Demon Lord of Gluttony, sustained a very hard hit to her head during a battle with Sebastian, an assassin from the royal family, eager to get take her life. As a result of her injury, she loses a part of her memory, along with the hate she possessed, and wakes up in a rural covenant to live out the rest of her days by working for the God of Chaos, Yuitherceus.
Check out the original source material, "Summoned As A Fake Hero: Why Am I A Demon Lord Now?"!
https://www.scribblehub.com/series/396385/summoned-as-a-fake-hero-why-am-i-a-demon-lord-now/ (It is also available on Webnovel)