Greiger, known as
Bommer in the Japanese version, was initially one of
Goodwin's 5 Dueling Assassins that was placed in the
Fortune Cup with the intent of exposing the
Signers, as well as a member of
Iliaster.An honorable Duelist, Greiger was prideful, yet stoic. Likely of South American origin, he came from a destitute village and Dueled to provide financial aid to it. Once he was transformed into one of the Dark Signers, Greiger obtained the Killer Whale
Dark Mark when Roman killed him by hanging him over the Negative
Ener-D. He was then brought back to life after Goodwin's defeat. However, after he became one of the Dark Signers, Greiger came to learn the truth.
(Yugioh 5d's).