4 : Mermaid: - The Girl Of Water City

: The episode highlights the growing danger of a "Moss Huge" monster, which demonstrates unusual intelligence by using parasitic spores to weaken adventurers and feeding on magic stones to evolve.

: The introduction of Marie reinforces the series' ongoing theme of the "Xenos"—monsters with human-like souls—and the moral complexity of Bell’s vow to protect them. 4 : Mermaid: The Girl of Water City

: Marie provides Bell with critical information about the Dungeon's layout and the monster's habits, establishing a bond that is vital for the party's survival in the subsequent battles. Key Themes and Development : The episode highlights the growing danger of

Watch the official trailer for the fourth season of the series here: 4 : Mermaid: The Girl of Water City