This story idea is officially taken by VerseMelody24.Go check it out.
Marinette is a angel that fell after choosing to leave from her realm.The other angels turned on her and she couldn't furfil her duties.She was thrown from heaven and fell in a mortals rose garden.Still with her wings in takt.
A mortal boy was playing with his dog Titus when he witnessed the massif fall and immediately got his family.The Wayne's did not espect to see a angel.