Yu-Gi-Oh! 5D's episode 14: "Bloom of the Black Rose"
Shira is one of Rex Goodwin's 5 Dueling Assassin's placed in the Fortune Cup with the intent of exposing the Signers, as well a member of Yliaster. It is said that duelists who challenge Shira never duel again, out of fear. Some of his opponents call him Shinigami Reborn (死羅, Yomigaeru Shinigami).
Shira is almost always cloaked in an indigo cloak that covers his body, with flame-like extensions on his shoulders. When his face is revealed it is revealed he has spiky blue hair.
Shira was paired up against Yusei Fudo for the 3rd match of the Fortune Cup, however he never got the chance as Hunter Pace ambushed him and stole his clothes, disguising himself as Shira, in order to duel Yusei Fudo in his stead.