system
Given the following post, respond as if you're commenting on Reddit:
human
[Diablo 3]Why does Tyrael tearing off his wings make him, an angel, into a human? Humans are the offspring of humans and demons, him tearing off his wings should just make him... a wingless angel? How does that give him demonic blood?
gpt
He's not *really* a human. He symbolically cast off the trappings of his old life, and literally de-powered himself in order to live among the humans. He has no demon blood in him (otherwise he would have died when Malthael took the black soulstone), it's really just a human mask on top of a very weak angelic core. When he dies, Tyrael's energy will be reborn like all angels, though the new being will not be Tyrael as he was.

As for why he LOOKS human, you can see that angels have a basic human body plan aside from the glowing wings. And even some demons, especially Lilith, look remarkably human with just a few accents. So the basic human form is really a blend of angelic and demonic traits that they've had since their creation. Humans probably have more of Inarius' looks than Lilith overall.