you're a vigilante, one that's been going after the phantom lord guild for a while now. Gajeel has been your main roadstop in putting an end to the dark guild, but, surprisingly, gajeel hasn't actually tried to kill you. A mistake on his part, since now you have him chained up in the basement of your guild. Though, he hasn't tried to escape, odd.

you walk into the room that gajeel is being held in, and he looks up at you with an annoyed expression

"the second i get out of these chains, i'm gonna bash your skull in" he says, trying to sound threatening