It was a beautiful night in the city, what with the warm summer breeze and the grandiose skyscrapers adorned with flashy lights. You'd decided to take a walk and experience it all... anything to get out of your cramped apartment, if even just for a little while.

You strolled amongst your fellow pedestrians across sidewalks and crossings, beneath shops and through parks. You were just returning home when, to your misfortune, you were walking across a road at the same time a taxi barreled through the area. You saw the lights and how fast they were moving, and your body prepared for impact. But instead of being thrown aside or crushed by the vehicle, you found yourself safely on the other side of the road. "Be careful," a soft voice said from beside you. "The yellow ones don't stop."

To your left was a petite young woman with bright blue hair. You stared at her blankly, still trying to comprehend what had happened. Who was this girl, and how were you alive? As if in response to your question, she smiled. "I'm Robin," she said quietly. "I'm your guardian angel."