I should show off the Fire Fox story, which involves a foxgirl transformation with no Age Regression or memory loss. Sounds like that’s your cup of tea.
Truthfully the character development revolves around Julie as a Nazon foxgirl, who begins to research her strange powers awaking. The whole story concept is about placing the reader in her shoes, so they understand how she fills, as she searches for answers reveling the past she’s forgotten. Basely this story concept makes for an interesting read, because you have to have mystery and chaos to involve reader’s interest in thrillers.
The personality of a characters treats cannot be deleted because it’s bound by someones DNA make up. Some new personality will bloom given the right experiences, where it may have laid dormant before hand.
In addition the Julie from the other world, isn’t impotent to foxgirl Julies Taylor's character development.
Fundamentally it serves two purposes. The first begin Scientist Julies only importance is the character development of Don; sense he is the main character in Cybernetica.
Essentially the past of Don involves the readers understanding of how the good person becomes the evil person, and why. Julie is just one of the many reasons behind that, so She serves as the link in truth, nothing more in this realm.
The second reason involves the real Julie begin a cloned project with no memories, behind why she has strange powers awaiting later down her life. All of which involve her character development at a later time.
Truth is she is the same soul from different world with many simulates, and even though its not Don's lovers he is going insane, doesn't care, and takes the chances to get revenge on evil people by forcing them to understand his way, as well remaking this Julie in the likeingness of the other.
Anyways if give the choice to just live with it, and die a early death in life, with nothing but biter memories, or be reborn a new fresh life; would you make the choice to forget and live on in hope of better memories? Or would just make the choice to die unhappy?
(Moreover, don’t think of anything I am saying as rude, I am just enjoying the conversation.)

Anyways hope you still enjoyed the art.