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 dragon birthmarks and five dragons that fit into the legend.

The present day Signers in Yu-Gi-Oh! 5D's include Yusei Fudo, Jack Atlas, Akiza, and Luna. The severed arm of the fifth signer is in Rex Goodwin's possession.

Each birthmark represents a part of the Crimson Dragon these marks are broken pieces of the dragon itself. And these five parts, were engraved and sealed into five people called "Signers".

Jack Atlas' mark represents the wings, Yusei's is the tail, Luna and Akiza's birthmarks each represent one of the dragon's claws.

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