answer:40-year-old introvert here. It’s possible that her desire to be “more talkative and more outgoing” is at least partially influenced by a belief that she should be. It’s also quite possible that she just doesn’t enjoy much of common social behavior. I spent years trying to figure out much of this about myself, and still don’t have a good answer. But I do know that I don’t enjoy parties. I prefer meaningful conversations that are one-on-one. I have a few good friends, and tend to let loose associations fall apart because I don’t really have the energy to maintain the tenuous threads that hold them together. Since it doesn’t come naturally to me, I always thought that if I just learned how, I could be happier because it appears that everyone enjoys meaningless blather about such and such. I am happier now that I can accept my introversion. Anyway, to somewhat answer your question: I believe that to some degree, you can appear to be less introverted if you work hard at it. But in my experience, introversion goes deeper, and may be something that we carry for a lifetime.