Ventus (KH III:DR)

Ventus whom is also known as Ven, is one of the main protagonists in Birth By Sleep (Final Mix) and in Kingdom Hearts III: Darkness Rising, he is a Keyblade Master and becomes the Pactmaker of Wizel the White Knight like his ancestor before him. In his dormant state his aging ceased but after Sora gained the Keyblade he started aging equivalent of Sora, e.g. when Sora became fifteen physically so did Ventus, he also seems to have a strong mental and spiritual link with Sora thanks to the connection between their Hearts for such a long period of time.