Signer

The Signers are the only group that can summon the legendary Crimson Dragon, the embodiment of the red star. There are five people in the world that have the Mark of the Dragon and five dragons that fit into the legend. Each birthmark represents a part of the Red Dragon God, as these marks themselves are actually broken pieces of the ancient divine red dragon itself, that later were divided into five parts. Thus engraved and sealed into five people called "Signers".

The present day Signers in Yu-Gi-Oh! 5D's include Yusei Fudo, Jack Atlas, Akiza Izinski, Luna, and Rudger. (Although in the dub Rex Goodwin has stated he is the fifth signer, this contradicts the original anime until later on, when he infuses Rudger's arm onto himself.) It is known that their powers were awakened by Rex Goodwin himself through the Fortune Cup. According to Goodwin, he did it so that they would defeat their archenemies, the "Dark Signers", along with the task of closing the door to the "Underworld".

Although according to the Star Guardian, to those who are Signers exists within some sort of "fate", derived from the Red Dragon power, one which cannot be escaped from. That strange fate was the one responsible for that all of the 4 Signers to have actually met in someway. Thus the "Fate of the Signers" unites each and every one of Yusei, Jack, Akiza and Luna's own destiny together in order to guide them all. None the less according to Goodwin the four of them are not only duelists chosen by the Dragon God itself, but they are also the reincarnations of the ancient Signers themselves. Also already predicted thousands of years ago the four of them would encounter one another.

Jack Atlas' mark represents the Wings, Yusei's is the Tail, Luna and Akiza's birthmarks each represent one of the dragon's Claws, and Rudgers was the Head mark. However, during the ultimate Shadow Turbo Duel against Rex Goodwin, the Tail and Head birthmarks are transferred, the Dragon Head is now under the possession of Yusei Fudo; with the Dragon's Tail (that was formerly Yusei's) choosing Crow as its new owner, making him the new fifth Signer.

A Signer's birthmark throbs and glows while they are in close proximity of one of the Dragons when it is fighting with a great deal of determination, particularly for the sake of their Signer. A Signer's birthmark glows and painfully digs into their arm, when they are in the presence of a Dark Signer.