Dr. Halsey and Cortana

This is dr. halsey from halo, 1st one is dr. halsey when she was young you can tell by the brown hair that she is young then the 2nd one in the middle, the middle one is her in halo 5 and spartan ops when her arm was shot off, and the last one to the right is cortana in the original purple version thats in halo 1 and reach. Cortana is actually a copy of dr. halsey witch is way there most identical in halo but a big age difference.