Happy @IronWidowMaikuB i agree how she can be the third main character of the infinity saga
Iron man 2 she literally is the avengers tease, avengers, it starts with her after the title card and her relationship with Clint along with seeing hulk transform first and closing the portal
Winter soldier she helps cap like with adjusting in modern times, age of ultron well you know, then civil war she’s middle ground despite siding with Tony initially she then becomes a fugitive with cap, and even in Ragnarok is her impact how banner reverts back and infinity war she’s with cap in trying to stop thanos from getting the final stone, and finally in endgame she sacrifices for the soul stone and help Hawkeye get a chance to be with his family as we saw how her death affected the six who she got to interact often
Compared with Thor he only meets them after Loki is captured, and knew Coulson only most, then he only really interacts often in age of ultron but even then leaves for the vision cave, then he leaves and finds hulk before infinity war isolates him till Wakanda and finally time gap in endgame he cut himself off due to guilt, while with nat she was with Steve between the gap
So now you finally convinced me :)