Hero

Even without his heart in his chest, Killian loved Emma enough to die for her. Quite willingly. Yet he tried to discern a loophole around the crocodile's commands because he was worried that even that would not be enough to save her. -Killian's thoughts turn dark in the hours after losing his heart- (Captain Swan, post 4.8, "Smash the Mirror," angsty but with a hopeful ending)