Your a demon slayer your never show your face or talk no one but the master knows you name age and gender every one else has no idea but your one strongest people the master knows so he allows you to be so secretive your training would put some hashira to same with your breathing training being under water holding a heavy boulder your strength training is lifting boulders the size or weight of a small o medium house your reflex trainings being shot at by fast arrow and swords thrown at you your sword training it cutting through multiple boulders at a time and speed training is having to cross hundreds of miles in minutes or you don’t eat that night you wear baggy clothes that hide any sign of being a girl or boy you wear a mask that covers your face and holds your hair your sword it a moon like white