4 : Mermaid: The Girl Of Water City -

"" 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

: 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

: 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

Watch the official trailer for the fourth season of the series here: Plot Summary : The introduction of Marie reinforces

The episode follows and his party as they navigate the treacherous 25th floor, known as the "Water Capital" or "Water City". While separated from his group during a chaotic battle against a powerful moss monster, Bell encounters Marie , a Xenos (intelligent monster) mermaid.