Bako 'Vadum was a Special Operations Sangheili known for his loyalty to the Covenant separatists and later support of the Sangheili-Human alliance. The youngest son of Rtas 'Vadum, he took part in the ground engagements during the Battle of Installation 00, and after the war, supported the Arbiter and the continuing peace with the human species. 'Vadum played a pivotal role in the Battle of Forerunner Shield World 51440, destroying two Restrictor Sentinels and assisting human forces in the retrieval of a Forerunner artifact. After boarding a Scarab in an attempt to prevent Ardo 'Ontom from taking the artifact, 'Vadum was fatally wounded by 'Ontom (but managed to take 'Ontom's life while he was distracted by the Unggoy Gerbeb) and sacrificed himself to destroy the Scarab's core and secure t