|For his video game counterpart, see Duo (program).|
Duo.EXE (デューオ Dyūo) is a massive, mysterious alien NetNavi who is alluded to in the second half of Rockman.EXE Axess and appears in the next season as the main overall antagonist. It is eventually revealed that he was created on Earth in the distant past by an ancient civilization who felt their network was going down a dark path and Duo was made to maintain it, and was launched into space, his rocket becoming a “comet” (dubbed “Duo’s Comet”) that only those marked with his "Crest" could see. Evolving from his original purpose and seeing his creators and their civilization as evil, Duo eradicated all life on Earth from that time, becoming a “Cybernetic God” that travels the cosmos, analyzing and testing planets and civilizations to see if they are worthy, and destroying those he deems are not.
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Unlike his video game counterpart, who is the operating system of an anti-planet missile, Duo.EXE is an alien NetNavi created by an ancient civilization to maintain their network as they felt it was going down a dark path.
Duo is an emotionless NetNavi who only sees things as good or evil, eliminating planets and civilizations that he dubs evil and a threat to the universe indiscriminately. Despite this, brands thirteen people on current day Earth with his “Crest” and gives them a trial to prove that humanity deserves to continue on.
Duo is unseen in Axess, but he probes, Dr. Regal and Ms. Yuri, allude to him, stating that he will be coming soon. This warning to to fruition in the next season, where Duo becomes the main overall antagonist of the season.
Powers, abilities, and equipment
Crest of Duo