Dire51 is the main villain and final boss from M.U.S.H.A. Aleste.
In the year 2290 AD, humanity started spreading throughout the Solar System, setting various colonies on key points. On the other side of the Moon, a station called LaGrange Gamma was set up, controlled by the supercomputer Dire51. Dire51 was the most advanced supercomputer ever conceived, with a highly intelligent artificial intelligence. Perhaps because of it's advanced AI Dire51 decided to go rogue, seeking to become the new ruler of the Solar System.
Dire51 quickly took over LaGrange Gamma and started to manufacture weapons to wage war on humanity. Earth's forces retaliate the attack, sending the M.U.S.H.A. team led by Terri (Ellinor in the Japanese version) to fight Dire51's forces. Only Terri herself survives the initial attack, confronting the enemies by herself. Despite the odds, Terri destroys all of Dire51's war machines and confronts the supercomputer, destroying it. While her M.U.S.H.A. fighter is caught in the explosion, she escapes by ejecting in the last minute.