Halo 4 Ivanoff, System Voice 1 game Ivanoff, System Voice is a character from Halo 4. Verified 21 Aug 2026 Appearances Games featuring Ivanoff, System Voice 88 Halo 4 6 November 2012 Other characters in Halo 4 Full cast Dalton Multiplayer Announcer Interrogator Del Rio Master Chief Halsey Cortana (Performance) Roland Grant Cortana (Voice), Halsey Cortana Didact
