Cerberus, The Guardian Angel (Rosella)

Bella, the daughter of Hades, also the greek mythology creature Cerberus. Hades treats his daughter awfully, causing Bella to seek help from the angels that come and go from the Underworld. She begs her father to let her be free, once she finally convinces him the angles give some of their magic and a set of wings to her with the promise she'll protect a young adult.