Kurokawa Ellen (黒川エレン?), officially spelt as Kurokawa Eren, is one of the four main Cures in Suite Pretty Cure♪. She later attends Private Aria Academy as a second-year student and is in the same class as Hibiki and Kanade.
Her previous alter ego was the cat fairy Siren (セイレーン?), who became brainwashed by Mephisto but was eventually freed.
Ellen's alter ego is Cure Beat (キュアビート?). Her catchphrase is "Can't stop my heart's beat!" (心のビートはもう止められないわ！?).