Kurokawa Ellen (黒川 エレン?) is one of the four main Cures in Suite Pretty Cure♪. 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 Kyua Bīto?). 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！ Kokoro no bīto wa mō tomerarenai wa!?)".