John

John was the Head Researcher at the Arlay Research Facility. John was very serious about his relationship with Ada and even used her name as his computer account's password. John lost his life, due to turning into a zombie following the Mansion Incident, after writing one final letter to Ada instructing her to get evidence of Umbrella's experiments and expose them to the public - evidently believing in their relationship right up to his death. In the letter, Ada is also referred to as not having contracted the T-Virus during the incident. How and when she escaped the Spencer Mansion is still unknown.