To be short and save you 37+ minutes: Demons are disembodied spirits of dead Giants. Fallen Angels are ex-servants of God thrown from the 3rd heaven to the 2nd heaven during the war in heaven. During the Endtime the fallen angels will leave to earth and the Ether 1 heaven, the air, as meteorites, comets and falling stars. Demons are the evil spirits who play on your emotion, lust and sins of the flesh. Fallen angels are the ones who strategize, lure people in elaborate traps!