Marco Rossi

Intelligent Soldier
A soldier who had exceptional computing skills at the military academy and was recruited into the Regular Army's Peregrine Falcons Special Forces. His skills proved enough that he accidentally build a sentient AI from stolen enemy data that he called MS-Alice, such skills helped him to swiftly ascended the ranks. Also recruited a young orphan, Midori Schumann, for her talent in developing weapons.

When General Morden attacked and the army was in chaos, he reassembled the Squad with his best friend, Tarma Roving, and the both went solo to kill Morden. Continuing to battle him, they are joined by the S.P.A.R.R.O.W.S.' Intelligence Unit's Eri Sakamoto and Fio Germi, when Morden allies himself with Martians to take over the world, but as they turn on him the PF Squad and his army unite forces to defeat the alien invasors.

After weird events begin to occur, Morden prepares to strike again, and the PF Squad is sent again to stop him, only it turns out this Morden was just an alien ploy as they've come back to attack Earth again, and take hostage one of the PF members. After infiltrating the alien Mothership, saving their comrade, and defeating the alien leader Rootmars, the aliens are defeated and war is finally over. Or is it?

After reporting of Morden's Army and Martian UFOs, the PF Squad and S.P.A.R.R.O.W.S. are sent, with 2 private contractors for this mission: Ralf Jones and Clark Still. However, Mordren and the Martians weren't planning to attack, but were joining forces to combat an even bigger threat.

Tarma and Eri are sent on a secret mission, when a terrorist organisation known as the Amadeus Syndicate threaten to destroy every nations cybercecurity, so Marco and Fio are joined by Nadia Cassel and Trevor Spacey to defeat the organization. Afterwards critical information on the Metal Slug project is stolen by the Ptolemaic Army, so Marco and Tarma must recover it.

When everyone tough war was finally over, Morden's Army put up one last stand. The group was joined again by Ralf and Clark, and a new recruit Leona Heidern and brought peace once and for all.