Emerging from Winsor McCay's *Little Nemo in Slumberland* as "Dr. Pill," Professor Genius evolved into King Morpheus's chief advisor in Slumberland, particularly in the 1992 film. He diligently oversees the kingdom's affairs, executes the king's commands, and protects Princess Camille. His mission requires retrieving young Nemo from the waking world via dirigible, bringing him to Slumberland as Morpheus's heir. As Nemo's mentor, Professor Genius guides him through prince lessons and Slumberland's customs, often facing resistance. When Nemo accidentally releases the Nightmare King, Professor Genius first tries blaming the clown Flip. Yet he ultimately proves loyal, joining Nemo's perilous quest to rescue the captured King Morpheus in Nightmare Land, aiding in the confrontation against the Nightmare King's forces. His intellect and sophistication contrast with flashes of cowardice. He values punctuality and order, employing analytical problem-solving to devise inventive solutions during crises. Though self-reliant and reserved, he reveals underlying compassion, supporting Nemo emotionally and urging him toward responsibility. He struggles to express emotions, often withdrawing into work, reflecting introversion and intellectual detachment. In the waking world, he manifests as an organist in a traveling circus, mirroring his role bridging reality and the fantastical realm of Slumberland.