Loki snarls as large hands grasp the chain that connects his shackles, his eyes darting from left to right, making him resemble a cornered animal, before they settle on the man, the not-brother in front of him, their bright green gaze almost physically burning. "Why do you do this?" he asks and grits his teeth. "Why do you intend to bring me back? Why don't you end it here, once and for all?"
"I would never hurt you", Thor says, the sadness in his voice and his eyes washes over Loki like ice cold water, makes him flinch and stare at him disbelievingly.
"Why not? I have hurt you! I have tried to kill you! Does this mean nothing to you?" What starts as a whisper grows in volume, in desperation, until Loki yells and screams and wants to clench his fists, to smash and throttle and destroy the love that is shining in those bright blue eyes.
"Of course it does."
"Then why? Why do you still believe I have some … goodness -" He spits that word as if it were an insult. "- in me?"
"Somebody has to," Thor says, his voice barely more than a whisper, "until the day you can believe it yourself."