From Halopedia, the Halo wiki
Gorian was among the many Banished soldiers on Installation 07 following the ambush on UNSC Infinity in December, 2559. During the Battle for Zeta Halo, an explosion at the Silent Auditorium fractured the ring. Following the explosion, Gorian was stranded on a fragment of the ring, where he met the Spartan Tomas Horvath. The two formed a truce until they could escape the fragment.
During a later battle, Horvath and Gorian faced off against each other, ending with Horvath impaling the Bloodstar on an energy sword provided to him earlier by Erik Bender. Gorian was killed, but as the two fighters had fallen upon a translocation pad, they were teleported to another part of the ring just before the pad was destroyed by Banished fire. Teleported to a partially collapsed mountain facility very far away from the beacon tower, Horvath shoved Gorian's body off the side of the mountain.
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