Born into a well-known clan, Re'gish had always strived to prove himself time and time again in order to become the personal attendant and bodyguard of the Arbiter, Thel 'Vadam. Constantly being alienated by his friends and family for is beliefs, Re'gish found comfort and meaning when he went to the elder Sangheili and talked with them about the old Covenant and its ways. Always striving to know more, Re'gish joined their order and became an Ossoona, one who would spy on the leaders of the Swords of Sanghelios and sow seeds of dissent along the way.