Lexaeus

 Origin: 

 The Narnian Battle of Puzzle: 

Lexaeus joined the crew of the Dawn Treader along with Xemnas, Axel, Zexion, Saix, and Xaldin in hope of finding Marluxia, Demyx, Luxord and Vexen working with Puzzle. When they attacked Puzzle's castle, Lexaeus went with Xaldin in search of specificly Marluxia. They instead ran into Luxord who defeated them both easily. Vexen then came in fighting with Axel.

 Death: 

Vexen tired of Lexaeus' talking threw a sharp ice shard to Lexaeus' heart. He began to bleed out and while Axel killed Vexen. Lexaeus told Xaldin to give a piece of his power to Thalia. After that he faded into the darkness and was no more.