From Halopedia, the Halo wiki
Fup was originally one of the sixty Unggoy on the Covenant cruiser Rapid Conversion. He was described as large, quiet, and deeply scarred. It was assumed he had been in several fights. In 2525, he was stationed on the Tiara over Harvest, during the First Battle of Harvest. He was one of the sixteen Unggoy defending Deacon Dadab's barricades on the Tiara.
Of these Unggoy, only Dadab, Bapap, Fup, and Humnum survived the firefight with Staff Sergeant Avery Johnson and Harvest's Colonial Militia. However, once the humans charged, Fup was hit and killed by a headshot after attempting to use his cutlass.
List of appearances