Vanitas

Vanitas, also known as The Masked Boy (仮面の少年 Kamen no Shōnen?), is a Keyblade wielder, the creation and second apprentice of Master Xehanort, the embodiment of the extracted darkness from Ventus's heart and the progenitor of the Unversed. Vanitas is one of the main antagonists in Kingdom Hearts Birth by Sleep.

Vanitas's name is derived from the Latin word for "Vanity" or "Emptiness", and was chosen for its meaning, that it sounded similar to "Ventus" and that it was a written pun on "Sora" in Japanese.

In the Pooh's Adventures series, Vanitas was resurrected by Mistress 9, who found the Unversed child's dark soul floating in the Underworld after being destroyed in Ventus's heart. This leads to Bowser recruiting Vanitas into his team, the Masters of Evil, and possibly letting his wife adopt him as her new son and brother to Bowser Jr. Vanitas has not appeared yet in the series because Bowse wants to use him as a surprise against Sora and his friends.

In the Sora's Adventures series, Vanitas was resurrected by Master Xehanort, and recruited as the 13th Seeker of Darkness in Xehanort's personal dark pieces of the X-blade. Like his master, Vanitas has not appeared yet in the series, preferring to use Winterbolt, Barnaby, Tex Richman, and various Jungle Adventure villains as pawns for the master's game.