Marco Rossi

Marco Rossi is a computer whiz and Lexi's cousin. He is somewhere in his twenties and was twice mistaken by Team Spy Gear as a monster. Although he is the main antagonist of Book 1, he becomes an ally of Team Spy Gear starting Book 2 and informally becomes part of their team.

Appearance
Marco is a big hairy man with a messy tangle of dreadlocks.

Before the Series
Marco and his friends were skilled hackers, and somehow, Viper managed to contact them and invited them to help him take down the Internet. Later on, Marco met "The Old Farmer" and rented the Old Farmhouse in Carrolton. Marco set off to work on his part from there.

Book 1: The Secret of Stoneship Woods
One day, Marco noticed something wrong with his cable modem. He walked out of the farmhouse, only to find a girl falling from the nearby willow tree seconds after stepping out of the farmhouse. Marco caught her then heard two boys calling out to him. Marco just stared at them and lay the girl down on the porch. Marco then noticed a back pain and asks the two boys if they had a heat-pack, who say no. After curing his back pain, Marco questioned the boys about why they were there. Later, Marco then introduced himself, and the kids introduced themselves as Jake, Lucas, and Lexi. Cyril later pops out of the pumpkin patch.

After Team Spy Gear thwarted his plan, Marco was apprehended by the Agency, who were initially only investigating his group's cyber-attacks. Marco, who by this point felt that Viper had set his group up and made him a fall guy, revealed what he knew about Viper. In exchange for this cooperation, the Agency released Marco. Marco then set up a camp in the woods and lived there.

Book 2: The Massively Multiplayer Mystery
In his time in the woods, Marco discovered a "cave mouth," and after much exploring, he found out that it was some underground ventilation system. Marco also caught occasional glimpses of a monster at night. While searching for ways to get revenge on Viper, Marco re-encountered Team Spy Gear, but was not interested in getting revenge on them; when Lexi was injured during the encounter, he gave her medical assistance and earned the team's respect. He also revealed what he knew about Viper, his access to advanced technology, as well as Viper's ventilated cave complex in the woods and the activities of the Slorg.