Kieran Quarles

Kieran Quarles, also known as Ki, is a skilled Keyblade weilder later on Keyblade master he is the brother of Sora

Trivia

 * Kieran will start his adventure in Kieran's Adventures of Kingdom Hearts
 * Kieran became a Keyblade Master by defeating Xemnas but became a true keyblade master by passing the Mark of Mastery Exam