Isabella Marie Cullen is the protagonist character of the Twilight book series by Stephenie Meyer. She is initially an ordinary teenage girl, but during the series, Bella marries vampire Edward Cullen, with whom she has a human-vampire hybrid daughter, Renesmee Cullen. The Twilight series, consisting of the novels Twilight, New Moon, Eclipse, and Breaking Dawn, is primarily narrated from Bella's point of view. In The Twilight Saga film series, Bella is portrayed by actress Kristen Stewart.

Breaking Dawn is the 2008 fourth novel in The Twilight Saga by American author Stephenie Meyer. Divided into three parts, the first and third sections are written from Bella Swan's perspective, and the second is written from the perspective of Jacob Black. The novel directly follows the events of the previous novel, Eclipse, as Bella and Edward Cullen get married, leaving behind a heartbroken Jacob. When Bella faces unexpected and life-threatening situations, she willingly risks her human life and possible vampire immortality.