Ami Futami, Twinkling Stars, Idolmaster

A woman dressed in a vibrant costume, likely for a cosplay event or performance. The main subject is wearing a sleeveless top with a diamond pattern and a matching skirt that falls just above her knees. Her hair is styled in loose waves, adding to the overall playful and youthful appearance of the costume. Notably, the woman's attire features a striking color scheme, with blue being the dominant hue, complemented by accents of white and light blue. This suggests that she may be portraying a character from an anime or manga series, possibly one known for its bright and cheerful aesthetic.