Who is the female lead in The Bridge?

Excuse me, could you clarify for me who exactly the female protagonist is in the show "The Bridge"? I've heard it's a fascinating series, but I'm a bit unsure of the key characters. Is it the detective from Sweden or the one from Denmark? And could you also mention a bit about her character, like her personality traits or her role in the show? I'm really intrigued to learn more about her.