The character known as "Pict Princess" begins as a human woman hunted and reshaped by the Pictonian aliens during their first invasion. Her metamorphosis propels her to leadership over the alien collective, though her human identity remains unrecorded. Her new form mirrors the Pictonians’ smooth, colorless, gelatinous bodies, adorned with glowing antennae and devoid of facial features, aligning with their unified aesthetic.

When global efforts to repel the Pictonians collapse, she resurfaces during the climax to address Italy’s unexpected defiance. Using a discarded felt-tip marker left by his ancestor, Italy sketches playful faces on the transformed Pictonians and allies, igniting contagious laughter and joy. This emotional surge fractures the aliens’ control, compelling the Pict Princess to act.

She confesses her species’ origin within a dying white star and their mission to drain Earth’s vibrancy and emotion, having lost the ability to feel joy themselves. The marker, an artifact foreign to their monochrome existence, emerges as the key catalyst—symbolizing humanity’s innate creativity and capacity for happiness. She requests the tool to teach her people this concept, then departs with her species to reverse their alterations and restore Earth.

Her story concludes within the film’s events, lacking expansion in subsequent media or additional backstory beyond her pivotal role in the conflict’s resolution.