Gigantification: Yu's Quirk allows her to grow to a gigantic size. She cannot variate between her base-height and the gigantified height achieved via her Quirk, making her only able to be either her normal height of 162cm (5 feet 4 inches) or her enlarged height of 2,062cm (67 feet 8 inches) tall.
Immense Strength: Yu possesses incredible strength befitting her giant form. She's powerful enough to knock out another giant villain with one kick to the jaw, and during the Kamino Incident was able to destroy the front of All For One's Nomu factory with one axe kick. During the events of the Paranormal Liberation War, Yu displayed the ability to compete with Geten in battle, and later was capable of slowing down Gigantomachia, even forcing his mouth open. In the Final War, with the aid of Rule enlarging support items, Yu fought alongside Fumikage Tokoyami and Gigantomachia to hold back the rewinding All For One.
Immense Durability: Yu's durability is similarly augmented to her strength. She was able to survive All For One's Air Cannon attack, however it knocked her out for a time. She did display enough stamina after the fact to utilize her Quirk to protect the U.A. students from the League of Villains. During the raid of the Gunga Mountain Villa, Yu went up against Geten and was able to shrug off one of his attacks before engaging him. Later in the battle, she survived attacks from Gigantomachia, albeit with heavy injury. In the Final War, she once again withstood being attacked by Machia, but was able to keep moving and even survive an Air Cannon from All For One without going down.
Moves:
Canyon Cannon: While in her giant form, Mt. Lady performs a flying kick.
Titan Cliff: Mt. Lady grows into her giant form and headbutts the enemy. Mt. Lady used this move to intercept Mr. Compress when he tried to chase after Katsuki.
Seduction: Yu is a prominent user of the seductive arts, using her looks to get what she wants. This was shown when she convinced a stand vender at the U.A. Sports Festival to give her free food.
Keen Intellect: Despite not being shown using any strategy in combat, Yu still proved that she is a hero that can grasp the context quickly. She can observe and understand what plan her allies are having, and provide any possible support at critical moments without being told beforehand, such as when she protected Izuku's group as mentioned above, or when she tried to pry Gigantomachia's mouth to help the U.A. High School students put the sedative into his mouth.
Equipment[]
Size Changing Suit: Yu wears a suit that gigantifies and returns to normal size as she does.
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