Angela was an archangel. She was a very powerful and respected archangel, until it started to discover the hidden flaws of Heaven and the corruptness that can occur.

Heaven

Angela was made in Heaven, and was a loved archangel. They would often hold meetings, and find ways to make Heaven a better place. Sadly, many other angels were starting to grow corrupt and do things for their own greed in Heaven since God had 'abandoned' them. In an attempt to 'hopefully' change Heaven which involved it leading protests and challenging those corrupt angels, the Head Angel mistook it as betrayal and stripped her of many duties. Angela who felt betrayed and furious at the Head Angel for allowing the corruptness to happen, started a riot with several other angels. It never worked out, since the Head Angel heard of the news and sentenced Angela down to earth.

Earth

Angela kept all her memories, but is now unable to see colors or make out faces of others. It's able to conceal her angry pretty well, never taking out it's rage on others. She met two other felines, who unlike her, do not have goals to get revenge. Now, she's trying to devise a plan to get back into Heaven and make sure 'that angel' regrets his misdeeds. She's also forced to go on an adventure with the other two, just casual things.