She started her career as an iconoclastic Guardian, with a reputation for being outspoken
and impatient with the dogma of her peers. She had a very colorful life on the battlefield,
whether fighting in the Crucible or doing solo missions and getting shot down repeatedly,
surviving against all odds. Her experience gave her a wealth of knowledge and newfound respect
among her fellow Warlocks.
Eventually, Ikora became a student of the Warlock Vanguard Osiris, arguably his greatest one. However, after her mentor's arrogance and obsession with the Vex grew out of control, she was forced to secretly take over many of his duties as Vanguard. Eventually, his focus on the Vex caused the Last City's other leaders to convene a meeting of the Consensus without Osiris present. The Speaker asked Ikora to take over officially as Warlock Vanguard, which she accepted. The Speaker then announced that he was exiling Osiris for his failure to serve the Last City and putting Guardians lives at risk chasing after Vex secrets. With no objections, Osiris was officially exiled and his post as Vanguard Commander was taken over by Zavala.