Yenra Sachiko Koshimizu from Idolmaster Cinderella Girls Sachiko Koshimizu in Blue Dress: The image features Sachiko Koshimizu from Idolmaster Cinderella Girls in a vibrant blue dress with white accents, posing confidently in front of an urban backdrop. The scene is set against a blurred cityscape with tall buildings and a bright sky, suggesting a daytime setting. The overall atmosphere exudes modernity and dynamism.