Solidified Luca's story!

His full name is Hugo Luca, he is 24 and a priest at st Hasdiel Church. He was adopted at a very young age by the oldest priest of the same church, so he naturally took after his adoptive father. It was never a secret that he's adopted, so when a man appeared and claimed to be his lost twin brother, he didn't find it hard to believe. They did look alike, after all.
In my head, his story sort of has two endings. In one, he never finds out that his "brother" was a demon send to push him further away from faith and break his connection with the angel Hasdiel. He succumbs to the cult and dies. In the second ending, Hasdiel reaches him and helps him break away from the cults influence, but puts him to a rather difficult task. The angel hands Luca a dagger, ordering him to plunge the holy metal into the heart of the cult leader