Katniss in The Hunger Games. She changes - she goes up a notch in badassery to survive the Games, for instance, but she doesn't agonise over this change.
She does though. Part of her internal conflict was whether or not to play to the cameras for sponsors. Does she play up the "relationship" with Peeta to get necessary survival stuffs or does she do things her way? That was a large part of it from the moment she got to the Capital--from shooting her arrow at Seneca Crane to eating the berries in the arena--she had to decide how much of herself she was going to be and how much she was going to be someone else for survival.
If you look at her evolution over the course of the series she changed from an it's all about me and taking care of my family attitude and all her anger against the Capital, to seeing the bigger picture and not letting the rebellion turn her into a monster (like Gale).
I still see that as internal conflict. Battling between the self she started out as and the self she was forced to become. Absent the external conflict she would have continued living the status quo.