"Will to Fight"(戦意, Sen'i?), also known by its Japanese soundtrack title as "Choose to Fight", is a theme from Final Fantasy XIII. It is a fast-paced theme which serves as background and battle theme for areas filled with enemy encounters. It was composed by Masashi Hamauzu.
Its lyrics refer to the heroes' will to fight against their fate as tools of the fal'Cie. It is the twenty-second track on the third disc of the original soundtrack, and the vocals are performed by Mina Sakai.