That's an interesting question. The only real parallel I can draw is to a series like Dr. Who. In Dr. Who, the Doctor takes normal humans and takes them through both time and space. When they jump through time, his "Companions", as they are called, remain the same age. Its almost as if they were removed from time and moved forward or back.Â
So, to answer your question, I think your character would still be 23. But that could just be me.
So, to answer your question, I think your character would still be 23. But that could just be me.