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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|five dragons]] that fit into the legend.
The present day Signers in [[Yu-Gi-Oh! 5D's]] include [[Yusei Fudo]], [[Jack Atlas]], [[Akiza Izinski]], [[Luna]] And [[Leo]] . The severed arm of the fifth signer is in [[Rex Goodwin|Rex Goodwin's]] possession, though the fifth signer is still alive as Rex stated that "he would show his face soon".
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".