Nezuko Kamado

Nezuko was then a human but after Muzan Jackson/Kibutsuji went Smooth Criminal......... he turned Nezuko into a demon. Her brother Tanjiro Kamado was desperately finding her a cure but then she was immune to sunlight, therefore only a Nichirin blade of a demon slayer can kill her. You are a demon slayer. You can be any rank in the Demon Slayer Corps. From Mizunoto to Hashira. You can be also a Girl or Boy.