仮面ライダー龍騎
is a shark-themed Kamen Rider who appears as Femme's replacement in the second Rider War during the events of "Kamen Rider Zi-O"s "Rider Time: Kamen Rider Ryuki" side story, the Kamen Rider introduced in an alternate reality depicted in "Kamen Rider Decade". He can combine his Contract Monsters Abysslasher and Abysshammer into the giant shark .