Final answer:
The dance innovator who experienced relief from emotional pain through movement is Martha Graham, a pioneer of modern dance.
Step-by-step explanation:
The dance innovator you're referring to, who found relief in movement during a time of despair, is none other than the modern dance pioneer Martha Graham. Her story is one of emotional expression through dance, where she found solace and a way to communicate feelings that words could not. Graham's innovative techniques and emotional depth revolutionized the world of dance, establishing her as a central figure in the creation of modern dance as an art form. Her experiences of finding comfort and self-expression in movement during challenging times is emblematic of her overall philosophy that focused on the expression of human emotion through bodily movement.