I knew it! Yumizuka's dead! She's fucking dead!!!

After reviewing my Shiki hypnotism theory, it seems unlikely that Nvwhatever is the one who hypnotized Shiki and gave him the power to "switch" into his killer mode. Arcueid stated that Dead Apostles have weak Mystic Eyes, which I interpreted as an incomplete hypnosis that only triggers under certain conditions, but it's more likely she meant that a DA's hypnotism is more like suggestion than full mind control. Shiki hasn't felt any different in the wake of Nvwhatever's death so I suppose it wasn't him that hypnotized Shiki - if he's under hypnosis at all. I don't know... I'll shut up and keep reading.