LogFAQs > #983443307

Yo-Yo from Mighty Avengers / Secret Warriors. The show got her and her slingshot thing from those comics. I know it's anal but I gotta give the actual creator their due.

I do like when there are unique twists to speedsters (or any super character, really). Another with one is the Whizzer on Squadron Supreme, who needs to balance each day's hyper-metabolic activity by spending a proportionate amount of in sedentary hypo-metabolism or suffer severe health problems. And there's Surge from Xavier's school, whose primary power is electricity, but gets faster & faster as she builds up a static charge.