I think we've seen Dazzler fly before, projecting hard-light to propel her, or something to that effect. I know she really developed her powers for some new effects back in the X-TREME X-MEN series where she was team leader.
Nico Minoru, one of the Runaways, and one of the lead characters of this series. (She-Hulk, Dazzler, Nico, Medusa and Singularity are the core cast).