I remember reading a novel, It was about a female protagonist who was artifically created by the Demon Race to be the strongest Demon, who live in some island with poor living conditions. She was supposed to destroy humanity or smth to get revenge for forcing them into land with the worst living conditions, but she is lazy, so she set up shop in a plain, and basically revived the land. She became seen as a goddess or avatar of a higher being as well. The land belonged to a Dragon I believe, and they fought, with MC winning because how else would it go. Any help would be much appreciated!!!
I can’t remember the name either but if anyone need more info she settled in an abandoned church and her mana revitalized the land in the surroundings. Her sister (aka also artificially made demon) has a split personality that thrives off of candy or sweets.
The Demon King’s Daughter is the World’s Strongest but a Shut-In! ~Shut Herself in an Abandoned Church to be Revered as the Goddess~