Garde are naturally more enhanced than humans, meaning they have the innate ability to run faster, they are naturally stronger and their senses are more enhanced. Among the Garde, this legacy further increases ones speed.
Nine first displays this Legacy when Four rescues Nine from the Mogadorian base in West Virginia. Nine runs around the ceiling at Superspeed while ferociously tearing the Mogadorians apart.
Marina first notices her Legacy of Superspeed while visting her cave in the mountains near the orphanage in Santa Teresa. She notices large boot prints entering the cave and fears that the Mogadorians have found her. In a panic she sprints back, noting that, like her ability to breath underwater, the Legacy of Superspeed presents itself when needed. The sprint back from the cave took less than five minutes while the hike there took about twenty five minutes.