User blog comment:B214/Volume 17 spoilers./@comment-187.209.0.247-20140306224029/@comment-9339850-20140306234237

She didn't care much about Euclid before all of this happened, so i doubt she'll show much reaction other than seeing him as a nuisance or potential threat depending on what he does. As for Issei almost killing Euclid, again she probably wouldn't care, especially if there was a reason that Issei had to fight him to the point where one would die.