Can Alucard smell whether you have blood or not? Yup and he does. If you aren't human but you have blood, can Alucard determine that you are not human? He's human. If you have blood and assuming Alucard drinks from it, would he sustain the same nutrients from it as he would a human? see above. If Alucard smells or drinks your blood, what can he determine from your character? Shuichi is healthy and energetic af. He ate pretty well before arriving and would be taking full advantage of the 24/7 room service provided to the public housing in the Up. Think typical Japanese diet overall with occasional fast food, also eats a lot of strawberry Pocky. He doesn't smoke or do drugs but he will sometimes get drunk. He doesn't exercise for the sake of exercise but he runs most everywhere so he gets plenty of it.
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If you aren't human but you have blood, can Alucard determine that you are not human? He's human.
If you have blood and assuming Alucard drinks from it, would he sustain the same nutrients from it as he would a human? see above.
If Alucard smells or drinks your blood, what can he determine from your character? Shuichi is healthy and energetic af. He ate pretty well before arriving and would be taking full advantage of the 24/7 room service provided to the public housing in the Up. Think typical Japanese diet overall with occasional fast food, also eats a lot of strawberry Pocky. He doesn't smoke or do drugs but he will sometimes get drunk. He doesn't exercise for the sake of exercise but he runs most everywhere so he gets plenty of it.