Or Karron was a Jedi Historian and later General during the Clone Wars. As a young Padawan, Or was trained to potentially take over from Master Jocasta Nu when she stepped down. As a Knight he travelled to many ancient worlds seeking new knowledge on the Jedi history and discovered many artifacts of great importance.
When the Clone Wars began however Karron was called up to fight and reluctantly he joined the War. He refused to become overly attatched to the Clones as he believed that they were being used as cannon fodda by the Republic.
In the end Master Karron was killed onboard his cruiser by a Separatist boarding force.