Ventus (Japanese: ヴェントゥス Hepburn: Ventusu), commonly referred to as Ven (ヴェン), is a fictional character from Square Enix's video game franchise Kingdom Hearts. Having first made cameos in Kingdom Hearts II and other related titles, Ventus was introduced in the 2010 prequel Kingdom Hearts Birth by Sleep as one of the three protagonists. In its story, Ventus is introduced as the youngest apprentice of Master Eraqus who trains him alongside his best friends, Terra and Aqua, to become experienced warriors with the Keyblade. When Terra goes on a mission to find Master Xehanort, Ventus follows him, having also become concerned about his fate. As Ventus journeys through various worlds, he learns about his origins as well as his relation with Xehanort and his apprentice Vanitas.