Spy the Hedgehog is the distant cousin of Sonic the Hedgehog and one of the nine mercenaries. His mission was to watch over Sonic from getting killed. In one mission, Spy took out the eggman defenses and murdered many professional villains.
Spy is allegedly the most sophisticated in the family. He is sarcastic, moody, and sometimes pushy to his family. But he is instead nice to his cousin, Sonic.
After the secret mercenary team was discovered, Spy went hiding back at his home in France. Shortly afterward. Rouge and Shadow traced Spy to France. However Spy kept moving to many different locations and became more harder and harder for Rouge and Shadow to find him. Finally, Spy gave up running and interrogated Rouge and Shadow revealing that he is one of Sonic's distant cousins.