Mindy is the sister of Mike Peterson, the mother of Keisha, and the aunt of Ace Peterson, and a resident of California. Mike entrusts Ace to her care when he himself enters S.H.I.E.L.D. training. She may have been seen from a distance at the end of the "Pilot", but wasn't definitively shown or 'labelled'. She appeared, and was clearly credited, at the climax of "Beginning of the End" to collect Ace.