Half-Demon: Various Yandere Demon Slayer Male Verse X Half Demon OC

Marie was born a human and a demon. She is now twenty-one and is traveling with a demon slayer. She gets an order to come to the Demon Slayer Headquarters and this is where her life changes forever.

(All Yanderes are adults, Tanjiro Inosuke, and Zenitsu, are at least 20 years old YES CHARACTERS ARE AGED UP

Also this is Male Verse so all females that are yandere are not just aged up but also genderbent as well)