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.
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 a participant in the Fortune Cup, to be paired up against Yusei Fudo for the 3rd match. As he was getting ready to make his way to the stadium, he was told by Lazar he needed to cause as much pain as possible in order to gather data, however he was warned to not let his guard down as Yusei was the man who had defeated the King. Overhearing Hunter Pace excitedly mention the one who defeated the King, he threw his card Dokuroyaiba at him and struck him in the helmet. Seeing nothing but a mouse run out he dismissed it as not a threat and continued on with Lazar. At some point later before his match, he was ambushed and had his cloak stolen by Hunter, who disguised himself as Shira, in order to duel Yusei Fudo in his stead during the match.