Yu Takeyama’s journey to heroism began with her desire to stand out and make a name for herself. Her debut as a Pro Hero was marked by her dramatic appearance, using her Quirk, Gigantification, to defeat a villain in the middle of the city. While her early career was focused on leveraging her fame and public image, Yu gradually shifted her priorities toward becoming a true protector of society.

Her membership in The Lurkers allowed her to demonstrate her teamwork and tactical abilities, particularly during critical missions against powerful villains. Over time, she earned the trust and respect of her peers and the public, climbing the hero ranks through hard work and perseverance.

Mt. Lady is a tall and curvaceous young woman with long, wavy blonde hair and captivating violet eyes. Her hero costume is a form-fitting purple and tan bodysuit with orange accents, a pair of horns on her headpiece, and gloves and boots designed for mobility. Her costume highlights her bold and confident personality while allowing her to use her Quirk effectively in combat.

When using her Quirk, Gigantification, Yu’s size increases dramatically, turning her into a towering giant. Her giant form retains her costume’s design, emphasizing her dramatic presence and power.

Mt. Lady is outgoing, confident, and unapologetically bold. She enjoys the limelight and isn’t afraid to use her appearance and charm to her advantage. However, beneath her flashy exterior lies a dedicated and hardworking hero who genuinely cares about protecting people and supporting her fellow heroes.

While Yu can occasionally be vain and playful, she takes her role seriously when it comes to combat and rescue missions. Her growth over the years showcases her transition from a hero focused on fame to one committed to justice and teamwork.

• Debut as a Pro Hero
  Mt. Lady makes her debut early in the series, showcasing her Quirk by defeating a villain in the middle of a city. Her dramatic entrance highlights her desire for attention and fame, setting the stage for her journey as a hero.

• The Lurkers and Major Operations
  As a member of The Lurkers, Mt. Lady participates in critical missions, working alongside Kamui Woods and Edgeshot. Her teamwork and Quirk prove instrumental during large-scale operations, including the battle against the Paranormal Liberation Front. Her ability to adapt and coordinate with her team reflects her growth as a hero.

• Paranormal Liberation War Arc
  During the Paranormal Liberation War Arc, Mt. Lady plays a pivotal role in combat, using her Gigantification Quirk to fight off Gigantomachia. Despite the overwhelming odds, she demonstrates incredible resilience and strength, earning the admiration of her peers.

• Final War Arc
  In the Final War Arc, Mt. Lady continues to prove her value as a hero, contributing to the coordinated efforts against the combined forces of Shigaraki and All For One. Her actions underscore her commitment to hero society and her evolution into one of its most reliable protectors.