4 : Mermaid: The Girl Of Water City -

: The episode serves as a precursor to the "Labyrinth Arc" climax, showcasing Bell's increasing maturity and his ability to trust and collaborate with non-human allies even in life-threatening situations.

"" is the fourth episode of the fourth season of the anime series Is It Wrong to Try to Pick Up Girls in a Dungeon? (also known as DanMachi ). This episode centers on the introduction of a new key character and the party's struggle within the lower levels of the Dungeon. Plot Summary 4 : Mermaid: The Girl of Water City

: 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. : The episode serves as a precursor to