Thoughts of the series so far:
-Yukino's my favorite in terms of characterization
-Feel like we need more of the teacher as a mentor character
-Yuri seems a bit out of place and is slightly terrifying because I keep thinking it will lead to cannibalism. Plus it feels a bit rushed and un-earned. Could have been built up more.
-Koishikawa has a good backstory, but it makes me wonder why Zombies aren't common knowledge