Big Boing, known as Lady Susan in the English dub, is a member of an elite group of American superheroes led by Dr. Riddles, referred to as The Majestic Twelve. Her unique ability involves bouncing her extremely large breasts up and down or shaking them with her arms to divert attention. Among the twelve members, she stands out the most, often appearing independently and frequently seen alongside Dr. Riddles. Occasionally, she demonstrates actual combat skills. Her speech is almost entirely limited to the word "yay."
(Source: Wikipedia, edited)
