Change or steadfast is a measure comparing where the subjective character is at the beginning of the story to how it is at the end of the story. They can waffle back and forth to a certain degree, but it must be within reasonable limits. If their too flighty, it may be difficult to convince an audience that the character is steadfast or change.
It’s important to distinguish MC personal goals, which are connected to their throughline resolve, from the Story Goal, which never changes (objectively speaking).
In Rocky, the story goal is for the underdog to win the fight and ends in failure, while the MC goal is to prove himself, which he does and leads to a MC Judgment Good.
In Ghostbusters, the story goal is to fight the supernatural phenomena and save New York City from being destroyed by Zul (or whatever the god’s name is). The MC Concern (personal goal) is steadfast in his efforts to charm Dana, even though he applies his effort to varying degrees.
When looking at your IC throughline, if she goes from being defined by her situation to looking at (or being looked at) in terms of Fixed Attitude, the she is a change character. Situation is only relevant to your IC throughline as it relates to the inequity at the heart of the story. If she goes from being defined by her situation in terms of her influence on the MC to being defined by her attitude, then that is a change.