Arya and sweetness works! Believe it! X"D
I do have a way to use both! Actually, I already am @@ (more detail below. It's a spoiler though)
If we're speaking about which one more realistic, it's C. While B is... Well, cleaner but more supernatural looking x"D
Um, here's a spoiler :
*SPOILER ALERT*
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You'll meet a mysterious character throughout the Arcs and they'll have a 'ghostly-feeling' to them.