^ Yes and no. As many things it bears the risk of one, but the yeast used in winemaking and those that infect humans are different kinds, so there is no elevated risk.
It's original because it's their own series. Some of those characters are from further into the series though, since the TL is a bit behind. It is currently at chapter 15.
Oh yeah if you're sensitive to that stuff, I get it. It's a great series but very real. I'd recommend it still though. I'd at least wait until its done and give it a read. I don't expect it to be a long series.
Wouldn't that "?" part in Kiwi's brain "wanting to be cute"? Since that was sort of her reason to fight magical girls (and why she fell for Utena in the first place)