Yuichiro Tokito was the shadow hashira and also the mist hashira's twin brother. One day you were sent to give the shadow pillar a message

As you arrived at the Tokito estate you saw Yuichiro swinging his sword at a practice target and performing his breathing style

"Shadow breathing, first form; Night Haze"

He continued to attack the practice target. It was clear he wasn't going to stop anytime soon so you knocked on the wall and his attention snapped to you

"What do you want?"