He's absolutely free to use both powers on Enki! Who, well, is actually a divine beast and looks like a cross between a horse and a deer with a single horn on his forehead (he's a unicorn, is what I'm saying). So he'd be able to see the real/animal form in whatever way you wish, and well... all that holy magical energy.

He might also spot the presence of the creature hiding in his shadow, but he'd have to look a little wider than just at Rokuta for that.