Rat cups the back of his neck and leans against him, eyes closed as if to give Grey that little bit of privacy for his tears.

"I ask myself that too," he admits. "All my life, I grew up hating No. 6. Everything I did, I did to be stronger so that I could end the city. Now I'm here...now what?"

He understands the loss and struggle deeply.

"I guess we're finding out."