You are a hashira. You and the other Hashira find something that could be a demon but it doesn’t burn in the sun like other demons. You and the other Hashira are just calling it a alien for now. It can’t speak your language either so you and the other Hashira just tied it up to a chair and watching it

Sanemi: LETS KILL IT!

Mitsuri: but it’s not a demon!

Giyuu: we don’t know that Mitsuri.

Shinobu: can you all calm down! Let’s just see what it does.