One way to know

I turned towards the other side and tried to run away but before I could take even a few steps, the shadows started pouncing and reached closer to me. They tried to take hold of me so that the knight could come closer. 

"Where are you going, my lady? Are you that ungrateful to leave me right there to be eaten when I did not think twice before giving up my life for you?" I did not need to know that they were the souls that had corrupted all those humans and beasts in the woods. 

But they were looking more ferocious now as if they had suddenly turned stronger. That made her wonder how many souls have they already eaten?

"You can not run away, my lady. The shadows never let go of their food and you are their food now. So, you better let them have you. It will be less painful that way!" The boy who was talking softly and smiling till now looked at me with anger and rage.