Dr. Lisa Addison, played by Heike Makatsch, is a character in the 2002 film Resident Evil.
Dr. Addison is an employee of The Hive, a genetic research facility run by the Umbrella Corporation. An outbreak of the T-Virus in The Hive, causes it to seal itself, dooming everyone inside.
When a commandos find Alice, who is suffering from amnesia, they take her and infiltrate The Hive. Matt Addison looks for information about Lisa, who was his sister, but finds her zombified. Alice saves him, and Matt explains he and Lisa were environmental activists, and Lisa infiltrated Umbrella to smuggle out the evidence of illegal experiments.
Alice remembers she was Lisa's contact in the Hive but does not tell Matt.