Yull

Yull was an Unggoy stationed on the Rapid Conversion and was part of Dadab's group. He was the first true Covenant casualty of the Human-Covenant War (excluding two Jackals killed in a pre-Battle of Harvest confrontation). He killed Osmo by shooting him with a plasma pistol, thus tearing his stomach apart. He was then killed by Tartarus, who pulled off his mask and threw him into a whirlpool and down a series of waterfalls because he threatened the Jiralhanae's plans.