Who is the main love interest of Scott Pilgrim

The main love interest in Scott Pilgrim is Ramona Flowers. The story of Scott Pilgrim is his battle against Ramona's evil ex-boyfriends.
The other love interest that Scott had were Knives Chau, the 17 year old girl he rebound dated after his break up with Envy and then dumped for Ramona. Scott also dated Kim Pine in high school.