Minish

The Minish, also known as Picori by the Hylians, are a small race of people no bigger than Link's thumb that appear in. Ezlo, the talking cap, and Vaati, the main antagonist of the game, were once Minish too.

Characteristics
The Minish resemble anthropomorphic mice that have, like Hylians, long pointy ears. They came from the Minish Realm a long time ago, when monsters threatened mankind, and gave the Hero of Men a sword of unparalleled power, the Picori Blade. They also left behind the Light Force for the Royal Family. Their help is celebrated annually in Hyrule through the Picori Festival. Every one hundred years, the doorway between their world and the world of men appears in the courtyard of Hyrule Castle.

It is said that Minish are invisible to adults; only good, well-behaved children can see them. The Minish are well-known for their Kinstone hiding capabilities. Wanting their human counterparts to find them, they place them in various obvious and inconspicuous places, and even keep some for themselves to fuse with Link when he comes along.

Their language is slightly different from that of the Minish Realm and they do not understand Hylian language.

Forest Picori
The Forest Picori are the Minish that live in the Minish Woods, and throughout Hyrule Field.

Mountain Minish
The Mountain Picori are seven Minish that followed Melari from the Minish Woods to Mount Crenel.

Town Minish
The Town Picori are the Minish that moved from the Minish Village to Hyrule Town due to their love for Humans.

Trivia

 * Other name ideas for the Minish included "Chilorians" and "Tiny People".
 * Whereas the Minish are known as Picori to Humans in the English version of the game, the other language versions do not actually feature such a distinction and have Minish and Humans using the same word.
 * The Minish appear to be based on the of  folklore. Likewise, the Town Picori are reminiscent of the  from Scottish folklore and the German.
 * was originally planned to feature small people as well, with Link even shrinking down to interact with them. While they are not specifically identified as Minish, the video where this is revealed does show footage from during the discussion.

Nomenclature
It is possible that the name Minish is derived from the word "diminish," meaning to make something smaller.