Quote Originally Posted by sdavis117 View Post
People age half as fast in the Halo universe. Also, she has probably spent most of her life in Cryo.

But yeah, she still looks way too young.
In the books shes refferenced to have grey hair, and considering she was the progenator of the spartan 2 program im pretty sure she spent alot of time with her spartans as they grew up.
Plus the fack cortana modeled herself after halsey as she was literaly halsey without social inhibitions[this is why cortana is naked and the other AI have clothes].