SonicBoom: Earth-1

Dawn Allen is the daughter of Barry and Iris Allen on Earth-1. Inheriting her father's connection to the speed force and by virtue his powers. While Dawn isnt as fast as her father, she broke the speed of sound at age 10, prompting her father to give her the nickname "SonicBoom" the loving name stuck as she trained to become the second Flash of Earth-1 creating her own legacy.