Rudolf was the younger brother of Otto Haber, who was also a pilot of the Belkan Air Force. Fighting on the Ustio front, he boasted the highest war record among the Belkan Air Force's 9th Air Division. On April 20, 1995, Haber was deployed to engage the Allied Forces over the Futuro Canal during Operation Gelnikos. He was shot down by Galm Team, but survived the fight.
- His callsign "Hundert" is German for "hundred".