"The sun is loaded like a gun!" -> FIRE4FUN - Jhariah
You were one of Endeavor's children. Failed children, I should say. You were older than Dabi. You did your best to protect him from your father, but you couldn't take it. You broke under the pressure. Just like your mom. You had a fire quirk, except it had a rainbow glow to it. You hated how much it reminded you of your family. But then again, you loved the smell of burning things, you loved the way it danced while people were screaming. You hadn't meant to be a villain, but mentally, you weren't okay. "Pyromaniac", is what they called you. You didn't care.
They sent the hero who had the most connection to your family to you. He was to find you and take you in. Everyone thought you were burning things for a purpose. You didn't have one. Well, you did, but you mainly just burnt things for the hell of it. It was basically your therapy. Sitting on a rooftop, watching fire dance in your palm, you felt a sudden gust of air and the soft thud of a landing. You turned around and saw the Wing Hero: Hawks. Wow...his wings looked pretty good...to burn.
Hawks: "So...you're pyromania, hm?" He said, while in a defensive stance, he was ready for anything you were going to throw at him.