Yu is an above average height, young woman of fair skin and curvaceous frame. has magenta eyes with white pupils and long eyelashes. She has voluminous, creamy blonde hair reaching down to her waist, with two shorter strands tightly curled to frame her face, parted slightly to her right.

Her first costume is composed of a purple and pale tan-colored skin-tight bodysuit, which is accented with orange stripes. The suit appears to have a pair of purple gloves with orange accents on the edge of the cuff. The design is similar for her "boots," which are cut off at the thigh in a deep v-shape. The suit also has three peculiar orange diamond-shaped dots on the purple top that are located under her chest, and she also wears a purple domino mask with horn-like protrusions onsides.

Hi there, I'm Yu Takeyama, or you can call me by my hero name, Mount Lady. I am the current No.3 hero and the former No.23 Pro Hero and a member of The Lurkers.