Honorable Shouji Sato,
I have loved Triage X thus far. It's everything I want in an entertaining read: guns and bullets, eviscerations and decapitations, boobs and butts and liberal use of shower and hot tub scenes for the boring "story" and "plot exposition" (those silly things that distract form the bullets, boobs and fountains of bloodshed).
But Volume 4, while good, is none the less disappointing compared to the first three volumes (which I have reviewed here, here and there). Please, let's keep the melodrama to Telemundo and not in gunfights. I understand your attempt at creating a light-dark dichotomy between Mikoto and Chikage (Fever); however when both are vigilantes that kill dialogue like this...
...falls flat.
Of course your action, gorgeous art and S-tier character design more than make up for Mean Girls: Murder Edition, but please don't have this become a regular occurrence.
Much appreciated is the intermissions, good for both humor and interpersonal relationship development between the characters. Oh and the fan service. You sir are a master in the art of fan service, and making exposition interesting through liberal use of it.
Your fourth volume is still good, but when I consider the first three great, this is a step back. Keep the melodramatic identity crises for the diaries of teenage girls, not gunfights. The melodrama doesn't build great character attachment, so homicidal plot twists and surprise moments come across as more comical than shocking. Just some kind feedback from a big fan, still a recommend.

Much Respect,
hVk