One of my stories is about a boy whose family can transform into this form named "The Hunter" and about how the next boy in line hunts down supernatural entities that would harm humanity. As of right now, the boy's name is Snow.
Another story is about Ariel, an archangel (yes, he's real, Wikipedia it) who fell from heaven. He meets Leon, the main character, and Leon becomes Ariel's "Envoy," which basically means that Leon can use Ariel's power in exchange for giving Ariel his body so he can interact with the mortal realm. Together, they take on demons and other fallen angels as they try to clear Ariel's name.