Twili

The Twili (pronounced ) are a race of shadow beings who inhabit the Twilight Realm in. Although usually a peaceful tribe, the Twili are transformed into hideous creatures known as Twilit Messengers by the Usurper King Zant, used to invade Hyrule. Link is able to return several of them to their normal forms when he encounters them in the Twilight Realm. He is even aided in his quest to stop Zant by Midna, a Twili and the princess of the Twilight Realm.

Background
The Twili are descendants of a tribe of sorcerers of unknown ethnicity,  though from Hyrule, who are referred to as Interlopers, who eons ago were condemned to the Twilight Realm by the Golden Goddesses of Hyrule as punishment for their misgoverned attempt to use magic to claim the Triforce. Their old magic became known as the Fused Shadow, a powerful instrument. However, during their failed attempt to conquer the Sacred Realm, their Fused Shadow was split into four pieces and scattered throughout the Twilight realm and Hyrule. The tribe lived and evolved in the Twilight Realm for centuries in isolation, mere shadows of what they once were, as over time they grew used to their surroundings and came to accept their fate. While some learned to love the beautiful peace that can be found only in Twilight, others felt that they were being oppressed by the people of the Light World. Though they lost their most powerful abilities, the Twili still possess some magical power, and the strongest of them can even teleport.

They built a leadership structure around those with the strongest magical abilities. After centuries of rule, the Twilight Princess Midna became just one of many rulers in a long line of royalty. It was around this time that a rebel force grew from within the Twilight, spearheaded by Zant. It is revealed that Zant believed that he was next to become Twilight ruler, but the position was passed over. In a terrible fit of rage, he used the power of his false-god Ganondorf to transform most of the inhabitants of Twilight into monsters and, as a form of humiliation, transformed Midna into an imp creature. Midna's only hope was to find the magic of her ancestors, the Fused Shadows, and use it against Zant to save the realm and her people.

The Twili are usually seen as enemies, but when Link goes to the Palace of Twilight, he reverts several of the Twili to their true forms.

Characteristics
The Twili have glowing markings on their skin, which is pale bluish-gray in color partly covered by black. This complexion may be due to lack of full light as the Twili have changed from what they were when they were ejected from the World of Light. They also have oval eyes that are normally red, yellow, or orange. They are usually quite thin as well as much taller than Hylians.

The Twili rarely speak, and most only communicate with other Twili. Their markings are distinct and signify their clans.