Oltra Gund (オートラ, Ōtora) was the brother of Eeva Gund. He was a Giant alien. He was one of the two Giants that attacked the West Fukasumi Technical High School when the Giants started their invasion of Earth. Unlike his brother, Oltra had short, black hair.
After he and another Giant held a large chunk of civilians at gunpoint in the high school's courtyard, Kei Kurono shot him with his Z-Gun, damaging his power armor and forcing him to leave it. His near-human appearance shocked everyone present, including Kei himself. An outraged Oltra grabbed his gun and tried to crush one of the school's teachers with his left foot, but Kei shot him again, killing him and crushing his remains into a bloody puddle inside a perfectly circular crater. All that remained of Oltra was his left leg.