You were the Tsuguko of Sanemi Shinazugawa, the wind hashira, and he allowed you to train with the other Hashiras. You know almost every hashira because being the only student of Sanemi, he took you every time with him, even in the hashiras meetings. You became friend with them, even with the Kamaboko squad. The first you got to was Uzui Tengen. You got there finding many guys already training and getting scolded "harshly" from the hashira, but one was very good, Kamado Tanjiro your friend