Kizuki in Britannia [Seven Deadly Sin Fanfic]

When a young woman got killed from a hit and run accident, god decided to give her another chance in life by putting her into a world of anime known as the Seven Deadly Sins. The catch is, not only was she set into the setting before the Holy War and way before Meliodas's betrayal but also that she became a demon mix between the demons of the Demon Clan and a man-eating demon from another anime called Kimetsu no Yaiba, making her own abilities that easily makes her very powerful and formidable.

And another thing, she was not expecting to attract both of the Leader of the Ten Commandments and the Executioner. The very ones who were supposed to fall in love with Elizabeth and Gelda, who also unexpectedly fell for her. Seems like her presence has changed things up, and she has to deal with it.