The sailor uniform is an item of clothing in the World Championship video games. It can only be worn by female characters. The male alternative is the stuffed collar uniform.
In all three games, Angie and Figaro both wear this outfit.
Stardust Accelerator[]
In Yu-Gi-Oh! 5D's World Championship 2009: Stardust Accelerator, it can be unlocked by unlocking all Tag opponents in World Championship Mode.
Reverse of Arcadia[]
In Yu-Gi-Oh! 5D's World Championship 2010: Reverse of Arcadia, it can be found in the puzzle room of Zeman's castle.
Star Chip collector Chihiro, who is exclusively in this game, wears this outfit.
Over the Nexus[]
In Yu-Gi-Oh! 5D's World Championship 2011: Over the Nexus, it can be found in the Duel Monsters Spirit World.
Female Player (WC11) in Sailor uniform.