Argentina has 35 indigenous people groups (often referred to as Argentine Amerindians or Native Argentines) officially recognized by the national government.

Then on October 8, 1860, President Santiago Derqui decreed the official name to be Repblica Argentina. In common speech, the country is referred to as "la Argentina" (the Argentine) in Spanish, bypassing the noun in any of the above expressions ("the Argentine [land]", "the Argentine [Republic]", etc.).

Calm-Calm Fruit, or Nagi Nagi no Mi, is also one of these Devil Fruit with annoyingly specific usabilities. All it does is shutting off the noises within the bubble it creates. Yes, it could prove helpful in stealth and infiltrating missions, but that's the extent of it.

As a Devil Fruit that has shown no clear weakness, the Magu Magu no Mi is perhaps one of the strongest.