Rainbow Dash, the pegasus with a serious need for speed... and rainbows.
I don't know whether they did it intentionally or not, but endowing the one tomboy with a rainbow in her name and
her very hair has implications
. But the Internet doesn't love her any less. She seems to be constantly shifting between ridiculously adorable and obnoxiously "radical" and I can't exactly say she's my favorite.
Went with the sports routine because her human equivalent would probably be more into sports than actual flight, or she's just training to become a jet fighter pilot, you decide.