Pip has changed very slightly over the first nine chapters. He has gotten a little bit older, he has grown more intelligent, and he has gotten more anger towards his sister and everyone else who bullies him, like Mr. Pumblechook. Everyone grows older over time so it is expected, but the amount of time that passes is kind of difficult to grasp. He has grown more intelligent by going to see Biddy who promises to help make him more uncommon because that seems to be his goal. It seems that he wants to be more uncommon for Estella than anyone else. Also, he slowly builds up more rage towards everyone who bullies him. The only person he still likes who bullies him is Estella.