The Su-43 Berkut is a modified Su-47 Berkut, and is the most advanced fighter in the arsenal of the Universal Peace Enforcement Organization, which saw action during the Intercorporate War. The Su-43 has been outfitted with new avionics (which include ailerons to provide roll control along with canards/elevators providing pitch assistance and a redesigned aft cockpit area, presumably for extra fuel/electronics), the COFFIN system, and new engines that allow it to fly at speeds surpassing Mach 2 in level flight. It also possesses the best mobility out of all standard aircraft, giving it its own edge in a dogfight. One of them be sent to you as special regards at you join in UPEO, it be show in front of you in runaways and it cockpits be open to welcome you.