Evelyn Witt
Evelyn Witt is the wife of Richard Witt mother of Ricky, Elon, Roger, and Elliott "Mirage" Witt, and the sister of Droz. She is a famed holographic engineer specializing in Holo-Pilot Tech who used to work for the IMC. Evelyn's memory declined over the years, which eventually resulted in being diagnosed with Alzheimer's disease, the most common type of dementia.
Background
She helped modify the unit used by her son in the Apex Games and is popular enough that Wattson knows and respects her work. She is presumably suffering from memory loss as implied by a recording of a phone call between her and her son.
Season 9
The Legacy Antigen
She was in Olympus to participate in the celebration for Pathfinder when the Medusa Vines disease outbreak occurred.
During the events of The Legacy Antigen, she was staying at one of the hotels in Olympus where she got paid a visit by her husband, Richard Witt earlier on. When Mirage visits her, she notices the arguments her son and Rampart has towards each other, trying to make him understand the good that Rampart brought to his life.
Thanks to her encouragement, Mirage realizes what it feels like to have a sibling and decided that Rampart should stay with him as a roommate. Her son would send her to a better hotel.
During this meeting, she would also mention to Elliott that her husband, Richard, has returned. Elliott ignores that, dismissing as just another complication from his mother's dementia. Unbeknownst to him, Evelyn's husband did truly come back.