|About me:||Six years after the Raccoon City incident, Ada was recruited by Albert Wesker to the "3rd Organization", and sent to an undisclosed village in Europe that had been taken over by Osmund Saddler, leader of the "Los lIIuminados" religious cult, after he infected the villagers with Plaga. Her mission was to steal a specialized sample of the Plaga held by Saddler. During her mission, she met once again with Leon, who was on a mission to save the president's daughter, Ashley Graham, from the same cult. During the mission, Ada enlisted the help of a researcher named Luis Sera, who knows everything about the sample and is willing to help Ada retrieve it. After ringing the church bell, Ada went to the house of Bitores Mendez, reading a book until Wesker called her to inform her of Luis' whereabouts. She heads to the location, only to discover that both Sera and Leon have been captured. Ada heads back to Mendez's house only to arrive just in time to save Leon from Mendez. However, Mendez caught her and tranquilized her, intending to use her as a sacrifice. Later, Ada finds Luis, who has yet to retrieve the sample. Ada meets Leon in the castle, and a short battle ensues between the two. Ada leaves him under the cover of her exploding sunglasses. Ada learns from Wesker that Luis has retrieved the sample and is given his location. Ada arrives too late and witnesses Luis die by the hands (or, rather, the tail) of Saddler.|
Wesker sent another loyal agent of his, Jack Krauser, to work alongside Ada in this mission. However, Ada and Krauser had difficulty seeing eye to eye, with Krauser distrusting Ada and believing her to be a threat to Wesker. Despite her pointing out that she had worked with Wesker longer than he did, he still kept his eye on her and promised to kill her should she try anything clever. Ada was upset by Wesker's desire to dispatch Leon and was reluctant to receive his order to kill him herself. Later, she was even more angered when Wesker decided to leave Leon to Krauser.