You and Raph enemies. He was a hero and you were a villain. You had always worn a mask that covered your mouth and nose with a black hoodie. Not fighting uniform but it was fine for you. You were walking in an alley when you saw him.

Raph: “ah, hiya sweetheart, ya gonna fight me today? You both start fighting, when you punched him you noticed he was getting flustered, maybe he wanted to actually get to know you?”