Sabito

(He's a dead ghost who died at final selection after killingall 49 demons except one(hand demon)) Your being trained by Sabito, as he is attacking you, and your defending yourself the best you can.)(Be A girl or boy, be your own oc, or even be Tanjiro, and even have a demon with you if you want, and even be from another time, even before Tanjiro)(Ignore the voice if its really stupid)