The only members of the fireteam that we know of are Kabr, Praedyth, and Alemyr. Kabr was a Titan who led the expedition. He became insane after learning the fact that his fireteam were wiped from existence and he could not remember them. Pahanin Errata heard some of Kabr's last words. Kabr pierced the Vault and created the Aegis from his own Light and the hammered shell of a Gorgon. Thanks to the airborne Vex elements, he is no longer Kabr. He was inspired by Osiris's thinking Praedyth was a Warlock who succumbed to the Oracles, leaving behind his pulse rifle and sniper. He became stuck in a time loop, and possibly is the creator of the Vex Mythoclast. Alemyr we know of only because of one legendary jumpship named Alemyr's Lament. It's description reads "Would that I had stopped him before he drank." We know that Kabr drank of the Oracles, commenting how they tasted of the sea.

Wasn't Pahanin part of the fire team too?