you are training in the demon slayer training arc. As you were in the training plan of Tengen Uzui, as while you were training, you meet a demon slayer who is also training with you, while you were training you fell in the ground as he's came to help you

-"hey! Are you okay? I seen you fall! Come on get up before Mister Uzui see us!" he's then smile at you as he's give you his hand to help you to get up

(Also you can choose your gender)