What I like about this series is how, despite a lot of moments when the characters are cute, there's nobody who's just cute; they're interesting and varied characters, who at times act cute. It doesn't prevent them from being smart, badass or dangerous when needed.
A lot happened in this volume. We meet the elves, who are interesting both as a take on elves as a species and as individuals; see who is at the center of the monster outbreak near Turnera; we see how the story of Charlotte and Byaku progressed after the siege of Bordeaux; there's a delightful little vignette as Ange and friends visit Maria; honestly, the volume is packed. And despite not having a dull moment, it still manages to have great quiet and introspective scenes, too.