Julian was a Gold of the Martian house Bellona, and son of Imperator Tiberius au Bellona. He is noted by Darrow to be the kindest of House Bellona when he introduces himself to the latter on their way to the Institute. He introduces Darrow to his fraternal twin brother Cassius, whom Julian loves with full pride and not a bit of jealousy in him.
During The Passage, the final test before entering the Institute, he is forced to fight to the death against his fellow classmate, Darrow. His weak-hearted personality led him to beg Darrow to allow himself to kill him. Darrow is forced to end his life in order to pass, to which he shows great regret towards.
"A slender boy with an open gaze and pretty smile" ~Red Rising (page 117)