Where's the Demonic Stone?

Description
'' Did you see what happened to that stone? Can you describe what it looks like? I don't know anything about that Demonic Stone nor what it looks like. The residents here have never seen or heard anything about a missing stone. Maybe what you're looking for isn't really here. (He thinks deeply for a moment and suddenly seems to have remembered something.)''

 When I think about it, perhaps it's possible that we can help you out after you meet our chief, Zeromin.