Brittany Pierce
Wikipedia
Glee Character Guide
Brittany Pierce is a bisexual cheerleader who joins the glee club with Quinn and Santana in the episode "Showmance". Brittany's character traits include finding recipes confusing, cheating off intellectually disabled classmates and not knowing her right hand from her left. She makes her singing debut in the season two episode "Britney/Brittany", performing three songs-"I'm a Slave 4 U", "Me Against the Music" and "Toxic"-all by Britney Spears. Brittany was in a relationship with Santana. Brittany has also had a brief romance with Artie that leads to a more serious relationship later in the season. She quits the cheerleading squad in "The Sue Sylvester Shuffle". In the episode "New York", Brittany tells Santana that she loves her far more than she's ever loved anyone else. In the third season, she is elected senior class president, defeating Kurt.
She and Santana formally begin dating, and after Santana is outed by Finn, they are open about their relationship. Their relationship ends, however, when Santana breaks up with her due to the distance. She later develops a relationship with Sam. During season 6, Brittany and Santana decide to get married. Later, at her and Santana's wedding she convinces Blaine and Kurt to marry alongside them as a joint ceremony.
She and Santana formally begin dating, and after Santana is outed by Finn, they are open about their relationship. Their relationship ends, however, when Santana breaks up with her due to the distance. She later develops a relationship with Sam. During season 6, Brittany and Santana decide to get married. Later, at her and Santana's wedding she convinces Blaine and Kurt to marry alongside them as a joint ceremony.