N-170 "Ares" is an incredibly powerful and dangerous battle robot created by Dr. Eggman Nega in 3236 as the 170th and final unit of the N-100 Series line. Although kept in storage for over a year, Ares was finally released in the year 3437 with a mission to destroy the rogue robot N-160 "Apollo". Although successful in his mission, Apollo managed to reprogram Ares to grant him free will before being destroyed. Following this and a conversation with Caput Mortum (who had been sent to recruit Apollo by G.U.N.), Ares decided to follow in his "brother's" footsteps and fight the Nega Nation as an agent of the United Federation's defence forces, the Guardian Units of Nations. His first mission as a G.U.N. agent was to accompany Caput and Alizarin as part of the newly formed Team Shade to the Spe