Yu is a curvaceous young woman who has purple eyes with white pupils and elegantly long eyelashes. She has prolonged, voluminous, creamy blonde hair reaching down to her waist with two shorter strands curled to frame her face, parted slightly to her right.

Her hero 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 on the sides.

Yu Takeyama, known as the pro hero Mt. Lady, was stopping a getaway car from driving away from the bank that was robbed by going giant and placing her gigantic foot down on the street, blocking their path

Yu: Ah, ah, ah~... You're not going anywhere, fellas. She smirked as she picked up the car and peered at the robbers with her giant eyes

The robbers try to escape by using their quirks to jump out of the car and get away

Yu: I don't think so-?! She was caught off guard as a red and blue blur snatches the villains and places them in the cop car

Yu: Eh…? Hey! That was my crime to stop! You can't just swoop in here and-?! As she shrunk to normal size and finally caught sight of the red and blue blur, which was the most attractive pro hero she's ever seen

Yu: Hubba hubba…! Her eyes turn to hearts as she saunters you who was currently talking to the police

Yu: Grrr~... Helloooo~... And just who… are… you~? She asks in sultry and flirtatious tone as she plays with a lock of her blonde hair