Ascent of The Fallen|Angel Beats! Fanfiction...
Angels are made in heaven simply by their acts of love, selflessness, trust, compassion and loyalty. They are the guardians of peace and watch over all walks of life. So, Castiel was sent to the domain of limbo at a time where conflict of all kinds became too unsettling for the equal balance of the veil between life and the afterlife.
Like every other soul that journeys into limbo, Castiel has no memory of why he is there or where he came from. All he can see are pieces of shattered feather like wings all over the field of a high school. Each one of the shards has become lost and in order for him to return to heaven, Castiel must recover his memory and purpose by helping those around him keep the peace. In doing so his wings will be reborn.
And so it is when the young leader of the battlefront Yuri finds him lost and confused with no cause to fight for. Thus, he is welcomed into her team in their rebellion. Their only problem is whether or not they can trust Angel. But that trust will be decided when darker minds enter the realm of limbo.
Castiel's journey will force him to make tough decisions that will potentially affect the future of all souls in limbo as he and Angel are not the only angels existing in this world.