This speech is useless you know. Us adults don't have such sound mind as you want to say. Coming to the battlefield is a lost cause right since we reach the safe zone.
These are 4 pages for a girl to get overwhelmed by fear and run away from the comrades (potentially to the enemy) even before actual do-or-die fight scenes, as the plot must be prolonged by this drama. Slightly cool German names though.
Tbh I don't see any harem elements here, just the girls (and girlish boys) get sexually harassed by monsters.
Like man, just do hentai already, not this dick-teasing R17 manga.