Supernatural

Castiel, the angel

Lucifer, the fallen archangel

Crowley, the demon

Sam Winchester

Dean Winchester

Gabriel, the archangel

Supernatural is a TV on CW about two siblings named Sam and Dean.  The show starts off of them trying to find their dad and the demon who killed their mum but they steer away from that COMPLETELY and meet angels, try to kill creatures called Leviathans, meet a Prophet of the Lord and a lot of other things.  It is a really interesting show and you should watch it!