Ada Wong is a mysterious femme-fatale, who’s motives are unknown when she is first name-dropped in Resident Evil, in one of the many documents found in the game. She is mentioned in a letter from a dying researcher to her. Ada Wong makes her first proper appearance in the special edition version of Resident Evil 2, where she supports one of the main player characters, Leon S Kennedy. Her actions throughout the Resident Evil 2 storyline are concluded in Resident Evil: The Umbrella Chronicles. She later appears in Resident Evil 4, again alongside Leon, during the Los Illuminados Incident.