It feels like it takes forever, and probably feels even worse for Setsuna. But soon he has cut enough and the demons seem satisfied, shove Shion away as they unhook Setsuna and let him down.

The moment they let go Shion is at Setsuna's side.

"Come on... they said there was first aid stuff outside."

He had hurt him, he can't think about that right now. What was important was stopping the bleeding and making sure that Setsuna didn't die regardless.