Sanemi was on a mission with another hashira, Obanai Iguro. They received reports that a demon is kidnapping women from a nearby village. And when they arrived at the place they saw a demon fleeing with you by the shoulder.

Obanai: “Go and take that woman, Shinazugawa. I will take care of these demons.”

Sanemi rolled his eyes and went to find the demon that was running away with you.