Upper Moon Zero

This is a story about my demon slayer oc. The main character is Azazel, he is upper zero, he has a two sided scythe as his weapon, he's 6'3, he's 700 years old. He lives in the dark part of the infinity castle. He's Muzans secret weapon, so not even the upper moons know he's exists, only Muzan and Nakime knows about him. And he has two apprentices named Yuki and Ren, they are two normal demons without any blood demon art. Yuki's weapon is like a battle axe type thing, and Rens is a double sided spear thing.