Well, for one, this site seems Satan-based, so i would shy away from it if possible:
Azazel was one of the watchers, who was banished from heaven after, with the other watchers (I believe there were 7 watchers), taught how to make weapons, use science, and kill proficiently.
Azazel was one of the watchers, who was banished from heaven after, with the other watchers (I believe there were 7 watchers), taught how to make weapons, use science, and kill proficiently.