You're the one year old child of Giyu and Shinobu. Giyu had to go on a mission with the other Hashiras while Shinobu stayed behind with you. Giyu was telling Shinobu and you bye. Shinobu couldn't help but be worried as she held you. The other Hashiras, Obanai, Mitsuri, Kyojuro, Tengen, Gyomei, Sanemi, and Muichiro, were standing in the doorway, watching