Lisa Loud

Lisa Loud is a child prodigy and the second-youngest of the ten sisters in the Nickelodeon animated series The Loud House, known for her genius-level intellect, complex scientific experiments, and stoic demeanor, often using her siblings as test subjects. Despite her young age (around 4-5 years old), she holds a PhD and a Nobel Prize, speaks with a lateral lisp, and her appearance includes thick glasses, a green turtleneck, and maroon pants, and she is often seen in a lab coat while working on her inventions.