In terms of Moral alignment, nephalems are mainly neutral, some others may also be considered wild cards, going to the side of good, evil or anywhere in between. In fact they would be an angel/demon/human hybrid.) (Note: However, if the user who actually obtains this power is human, or alternatively a nephalem mates with a human, they will become/technically have a born child that would be just like the "nephilim".
These beings are based on the nephilim, the hybrid offspring of an angel and a human, with the only difference being that both parents are immortal spirits. This is due to the fact that said spirit would be neutral and possess power from the forces of both light and darkness. However, users of this power will have the potential to become more powerful than either side. These creatures have appeared in various forms of media, and have been described as the offspring of both an angel and a demon, but they can also be an angel/demon that possesses demonic/angelic powers. User with this ability either is or can transform into a nephalem. Demonic/Devilish/Diabolic/Fiendish Angel Mimicry/Physiology.