What is the Issue that she is Steadfast on? What is the Issue the Influence Character Changes on?
For instance, it could be that she starts out with a little bit of self-reliance and then grows into even greater self-reliance at the end.
I’m sure you understand that characters can grow without fundamentally changing their point of view. This sounds like the case. If you haven’t yet, you might want to check out The Toy Story’s Dilemma. I explain why Woody–who most would consider to be a Chnaged character–is clearly a Steadfast character. He appears to be less “selfish” at the end, but really he has grown in his Resolve that playing is everything. That’s the essential part of the storyform–the part wrapped up in Buzz’s perspective, their relationship, and the move itself.