Why Catherine and Quatre? Well, Catherine has a caring heart. She also hates war, like Quatre. I firmly believe in the Heero/ Relena, Duo/ Hilde, and Wufei/ Sally. I also believe that Trowa and Catherine are brother and sister, so they couldn't be together. The only boy left for Catherine would be Quatre... see it makes sense! Also, Quatre would be around Catherine a lot because of Trowa being his best friend. Besides Quatre is my favorite Gundam Pilot and Catherine is my favorite Gundam Girl.