1) Not human! Well, half-human. He's a half-elf. With some extra enhancements, actually: while normal half-elves aren't physiologically that different from humans, Yuan's metabolism is stopped, which means Garrett may eventually notice that he sometimes kind of...forgets to breathe? Like, he breathes so that he has air to talk with, but he doesn't actually need oxygen to live or anything, so there are times when he just...stops. Weird.
2) He smells like ~*~magic~*~. no really, he's a spellcaster, and likely to be actively continuing to experiment with how various people's magic works. Yuan is a lightning mage, so will regularly smell like ozone, a scent which sharpens when he's alarmed even if he's not actively casting. Also probably like books/paper dust, and whatever planet they're currently nearby.
3) Half-elves are noted in canon to have mana - magic energy - literally in their blood. I don't know enough about Twilight to even guess how noticeable that is, but it seems like the kind of thing that might be relevant to a vampire.
4) Nope!
5) He'd be in real trouble if a little sparkling could dazzle him~ see icon
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2) He smells like ~*~magic~*~. no really, he's a spellcaster, and likely to be actively continuing to experiment with how various people's magic works. Yuan is a lightning mage, so will regularly smell like ozone, a scent which sharpens when he's alarmed even if he's not actively casting. Also probably like books/paper dust, and whatever planet they're currently nearby.
3) Half-elves are noted in canon to have mana - magic energy - literally in their blood. I don't know enough about Twilight to even guess how noticeable that is, but it seems like the kind of thing that might be relevant to a vampire.
4) Nope!
5) He'd be in real trouble if a little sparkling could dazzle him~ see icon