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.

Coming-of-Age Ritual
Every male member 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".

Mahrajan Festival
Mahrajan is the Imuchakk Tribe's traditional festival. It is a naming ceremony for the warriors who passed the Coming-of-Age Ritual and to show gratitude for the bounties they returned with.