Mission Mermaiden - Hasumi And The Deep Sea Sis... May 2026

Gades, the primary antagonists of the series, are a ruthless organization driven by a desire to dominate the world's oceans. Led by the enigmatic and cunning , Gades will stop at nothing to achieve their goals, including exploiting marine resources, polluting the ocean, and enslaving marine life.

As Mission Mermaiden, Hasumi embarks on a series of perilous quests to thwart Gades' plans, protect marine life, and promote environmental sustainability. Along the way, she forges strong bonds with her new mermaid friends, including Ling, , and Nix , each possessing unique abilities and strengths. Mission Mermaiden - Hasumi and the Deep Sea Sis...

follows the story of Hasumi, a young and spirited high school student who becomes embroiled in an extraordinary adventure. While on a diving excursion, Hasumi stumbles upon a hidden underwater city inhabited by a group of mermaid-like creatures known as the Deep Sea Sisters . These mystical beings possess remarkable abilities, allowing them to communicate with sea creatures and harness the power of the ocean. Gades, the primary antagonists of the series, are