Imuchakk

Imuchakk (イムチャック, Imuchakku) is of the countries in Seven Seas Alliance, currently ruled by Chief Rametoto. The members of the Imuchakk tribe have gigantic physique and blue hair.

Culture
Every male members of the tribe must go through a coming-of-age ceremony by defeating a Rampaging Unicorn, a type of fish. When in age of the ceremony, his childhood name becomes obsolete and until the man defeats the Rampaging Unicorn he is not given an adult name and is addressed as "nameless".