Wings

There are multiple wings in game, here is a list of each pair of wings I know of containing; how to unlock them and their descriptions.

"Given to those that the Angels deemed worthy to take on their sacred task."
These pair of wings are a simple light blue neon set of wings,

Unlocked by getting your first sacred flame at the start of the game

"Rare chosen wings that have been split, creating the appearance of a butterfly."
Butterfly Wings Orange are bright orange neon wings, looking like real butterfly wings (not the cartoony ones).

They are unlocked by obtaining 25 coins (there are 100 to collect in total)

"Rare chosen wing made from the discarded halo of an angel."
The appearance of this set of wings is a ring of pale blue neon on attached to your back,

Accessed by obtaining 50 coins (the halfway mark)

"Rare chosen wing made from the discarded halo of an angel."
It has the same looks of Ring Wing Blue but instead in a mellow pink neon stuck to your spine,

Rewarded after finishing Lore Keeper's quest after giving the 7 flames to the dying Sun, obtaining all 10 Sid Orbs (Dark Orbs)