So hard to remember all the characters, but only the ones I do remember (besides Momo and that H kid) show up in this vol so it's all good!
Reaper Record I: ???/Azami POV
Children Record III: Shintaro POV
Reaper Record II: ???/Azami POV
Children Record IV: Shintaro POV
Reaper Record III: ???/Azami POV
Children Record V: Shintaro POV
Reaper Record IV: ???/Azami POV
Children Record VI: Shintaro POV
Headphone Actor V: Ene POV
This vol focuses on Marie and her past, which was interesting.
Finally the meaning behind Kagerou Daze is revealed, sort of. I'm not sure if it's just coincidence that two characters who have never met came up with the same name or if they came up with it but it means something different.
Since some questions are answered Jin made sure to throw in a bit of a cliff hanger, too bad for him I don't care about the answer to this one.
Final Thoughts: Questions are answered (a bit), secrets and pasts are revealed, and a character can't die. Good on Shintaro for growing up a bit.
Side note: Last vol I wondered Kagerou Daze roman numeral chapters and Kagerou Daze number chapters might signify different things, but this vol Children Record which was number chapters in vol 3 was now roman numeral chapters so maybe it doesn't mean anything?