Michiru Kiryuu is a significant character in the anime series 'Futari wa Precure Splash☆Star.' Alongside her twin sister Kaoru, she initially serves as an antagonist under the influence of the Dark Fall. Over time, Michiru experiences a change of heart and chooses to support the main protagonists, Saki and Mai. She is a complex character who struggles with loyalty and identity, making her development an essential part of the series' narrative.