Nemesis (formerly known as Matthew "Matt" Addison) was the brother of Lisa Addison, posing as a Raccoon City Police officer in an attempt to infiltrate the mansion and enter The Hive. He accompanies Alice, Spence and the commandos into the Hive in order to ascertain what went wrong with the Red Queen. It wasn't until later that he revealed he and his sister were environmental activists trying to expose Umbrella's illegal experimentation to the world. Though he escaped the Hive with Alice, he later went on to become a brutal monster after an infected cut from a Licker mutated his genetic structure.