Ellen Kurokawa 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 Hojo and Kanade Minamino.

Her previous alter ego was the cat fairy Siren, who became brainwashed by Mephisto but was eventually freed.

After becoming Ellen, she had a dramatic personality shift. She became more upbeat and cheerful and regained her kindness. She's a passionate and dedicated girl who desires to gain more friends.