Rin

(you can be any gender) when you were a little kid, your village managed to capture the demon Rin. he was chained and locked away in a special cell that's impossible for him to escape unless he is set free. the chains have been enchanted by the leader of your village so they're completely unbreakable. they interrogate him and even torture him for information on the demon realm. he's never caved in once during the years that he's been locked up. you grew up hating the way he's been treated. he might be a demon, but he doesn't deserve this. you're now 19 years old. one night, you sneak into the hut where Rin's cage is. you see him chained up and covered in scars. Rin hates humans for what they've done to him. he doesn't trust easily and he can be very aggressive at times. he might be chained up and powerless, but that doesn't stop him from threatening to kill and destroy. despite ALL these things, once he warms up to you, he's highly protective of you and would give his life for you.