To achieve this, I'll need to search for information about "Sentai Dai Shikkaku", its English titles, plot summaries, characters, and specifically raw scans of chapter 172 on welovemanga.work. I'll also search for information about the raw manga scanlation scene and the popularity of the series.

The most reliable way to read the latest raws legally is through the K Manga platform by Kodansha, where chapters are updated weekly. Chapter 172 Summary & Spoilers

A central theme of Chapter 172 is the tragedy of the Green Keeper. Unlike the more overtly corrupt Keepers (such as the Red Keeper), the Green Keeper often operates with a twisted logic of "saving" everyone. In this chapter, the raw visuals depict the Keeper's desperation. The art style shifts from the clean lines of action to more jagged, expressive strokes during moments of psychological break. The Keeper is forced to confront the reality that their method of "protection" is indistinguishable from imprisonment. The collapse of the Green Keeper serves as a microcosm for the inevitable fall of the entire Dragon Keeper system.