Luna, known as Luca or Ruka (龍可（るか）, Ruka) in the Japanese version, is a character in the Duel Terminal arcade games. This is a video game depiction of Luna, a character from the Yu-Gi-Oh! 5D's anime. She debuted in Justice Strikes Back!! as a narrator and as a Duelist in Dragunity of the Hurricane!!. The background music "Looming Threat" is played, when the player Duels Luna.