The movie   


Envy Adams is played by Brie Larson, an actress,
 musician, and songwriter. She has starred in films
and TV Shows like Hoot and United States of Tara.
The subsequent plot from the comics of Todd cheating
 on her with Lynette, her later hooking up with Gideon
 Graves, and the final conclusive ending with Scott
 Pilgrim is never gone into, making her truly
responsible for breaking Scott's heart.

- Scott Pilgrim Wiki