Lukas-G305, also known as Luke Wall and the Exile, was a Spartan from Gamma company, before defecting to the Insurrection. Intelligent, brilliant, and cunning, he was regarded by Ajax-013 as one of his top pupils, but became his greatest shame. Despite efforts to indoctrinate him to the UNSC cause, he rebelled, leaving to join the Insurrection. Re-emerging years later as a Insurrectionist leader, he became pragmatic, ruthless, and utterly dedicated to the cause of usurping UNSC control of the outer colonies.