Lucien Grimley, known in Japan as Ikkaku Tachibana「橘一角」(Tachibana Ikkaku) is a Duelist who enters the Genex Tournament from North Academy. As a failing Duelist, Lucien makes a deal with the malevolent spirit of the forbidden and cursed "Grim Reaper" card sealed by the school, selling his soul to obtain incredible draw power. In the English dub, Lucien makes death-related puns while using the "Grim Reaper".