Karen (カレン Karen), Kayla in the English dub, is one of the two antagonists from the episode, Move Fast, Doraemon! The Galactic Grandprix. She's the one who invited Doraemon to participate in the race and also lets Nobita and his friends to participate.
She's the daughter of the race chairman and used this fact to rig the race so her lover, Bengal can win the race and they can get married without her father protesting. In the end both of them were arrested. As they are taken to jail, her father was left asking herself where she went wrong.