" So this,” she said, “what’s happening and what’s going to happen, this isn’t your fault. You can’t control everything and not everything is your responsibility. At Croke Park you said something about how you don’t want to drag me around after you just so I can die beside you. I wanted to tell you then, but I didn’t have the words and I didn’t have the time. I’m here because I choose to be. You save my life. I save yours. That’s how we work.”

“Until the end.”

“Until the end. "

― Derek Landy , Dark Days (Skulduggery Pleasant, #4)