Kaoru Kiryuu is a mysterious and reserved character from the anime series "Futari wa Precure Splash☆Star." Alongside her twin sister Michiru, Kaoru initially serves as an antagonist, working against the Precure duo under the influence of the Dark Fall organization. Over time, Kaoru develops a deeper understanding of friendship and kindness through her interactions with Saki and Mai, eventually switching sides to help the Precure. Her journey is marked by emotional growth and themes of redemption.