Rei doesn't seem to be totally unpleased about the current situation she's in. Kinda like a case where when one gets into a situation one typically wouldn't openly get into but when actually in that situation have a sort of a guilty pleasure enjoying the situation.
sanada_yukimora said: If I ever made an anime, I'd go against the modern flow and make the main character the go-to guy. The bad-ass of the series, instead of making some side character the bad-ass like they always end up doing.