Essence of the Triforce

The Essence of the Triforce is an invisible, sentient being that communicates from the Triforce. It appears in a few The Legend of Zelda games.

The Legend of Zelda: A Link to the Past
The Essence of the Triforce first appears in The Legend of Zelda: A Link to the Past's ending. It introduces itself to Link and explains about how the Triforce grants wishes.

According the Essence of the Triforce, whoever touches the Triforce will have their wishes granted, regardless whether they are good or evil. The Essence of the Triforce also says that stronger wishes are reflected by the Triforce, which grants them more strongly strongly. It then says that Ganon's wish was to conquer the world, which turned the Golden Land into the Dark World, where Ganon would build up power to try and conquer the Light World next. The Essence of the Triforce tells Link that since Ganon was defeated, the Triforce awaits a new owner. It encourages Link to make a wish from his heart, and Link presumably wishes for Hyrule to be restored.

The Legend of Zelda: Oracle of Seasons / Oracle of Ages
The Triforce is also shown to be sentient in the intro for both The Legend of Zelda: Oracle of Seasons and The Legend of Zelda: Oracle of Ages. Both intros end with Link encountering the Triforce, which an aura comes out from, to warp him into another area. In The Legend of Zelda: Oracle of Seasons, the aura is orange and warps Link to Holodrum. In The Legend of Zelda: Oracle of Ages, the aura is blue and warps Link to Labyrnna. In either game, when the player starts a new game file, the scene continues. It shows Link falling in a black void, and the same aura appears to Link and says, "Accept our quest, hero!".