Kate Bush is a member of the Shrike Team, an all-female mobile suit team that serves as the League Militaire's primary combat unit against the Zanscare Empire. As with the other members, she pilots a LM111E02 Gun-EZ.
Along with the rest of the Shrike Team, she accompanies the League Militaire rebels as they head to Arti Gibraltar. After the death of fellow Shrike Team pilot Mahalia Merrill, Kate pays her respects with the rest of the team, as well as Uso Ewin and Shahkti Kareen.
While still at the PCST's Gibraltar spaceport, the Shrike Team is pulled into battle against BESPA. During the ensuing battle, the spaceport's mass driver is hit and threatens to collapse, and Kate breaks from the battle to hold up the damaged rail with her mobile suit. However, this leaves her open to attack, and BESPA pilot Kwan Lee takes advantage of this, stabbing her Gun-EZ in the cockpit with his beam saber, killing her as her mobile suit remains fixed in place.
- Kate Bush's name is derived from real-world singer .