He was on a mission. He was alone fighting demons. But these ones were powerful, and he seemed a little on edge.

Inosuke: 'tch...those damned demons...'

You were walking too, on a mission. Aware of a another's presence, you keep walking Inosuke senses your presence too, but he treats everything as a threat right now

Inosuke: 'Hey! Come out and fight me! Fight me now! Don't cower!'