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 one of the staffs who used her position to rig the race so her lover, Bengal Richiness can win the race so that they can get married without her father's opposition. After their scheme is exposed, Karen and Bengal are arrested by the police. As they are taken to jail, her father is left asking himself where she went wrong.