I started a thread on that a while back, at the moment the Personalities that you chose are hard-coded into the game (I’m not a developer, so I don’t know what that means) but Fatshark is apparently working to fix whatever issue that prevents those changes, so that we can change our Rejects’ Personalities. Modders have already figured out how to change our Rejects’ heights post-creation, so there’s hope!
I have no idea how it’d be such a hassle myself… but alright, good to know.