Captain Marvel accepts and embraces responsibility as a leader in this fight against Zawe Ashton's Dar-Benn, a Kree warrior that serves as the antagonist in this film.

Source: https://comicbook.com/marvel/news/the-marvels-teaser-new-footage-captain-marvel-brie-larson/

The trio begin to work together, and mend their interpersonal relationships, to save a refugee camp of Skrulls from Dar-Benn (Zawe Ashton).

Source: https://comicbook.com/movies/news/the-marvels-confirms-avengers-status-multiverse-saga/

While a compelling villain with an interesting backstory, Dar-Benn is killed when she unites both bangles.

Source: https://screenrant.com/the-marvels-cast-character-guide/