I wasn't sure whether it was Pharah or her mother at first. I'm a little confused on the timelines because Jack, Reyes and Reaper were part of the original generation and 20 years passed until the present, explaining why they're all (presumably including Reyes) old men. But in that photo Jack is still young.
If Pharah was never in Overwatch it must be her mother. Then again, why aren't Mercy, Tracer and McCree older? Jack's hair went white and receded in that time but they all look the same.