A biochemist who harbors an unrequited crush on his colleague Diane. After acquiring a mysterious aphrodisiac, he experiments on himself and uses it to navigate social situations. He eventually falls genuinely in love with Diane, but becomes devastated when she is magically compelled to marry another man. He orchestrates a plan to neutralize the spell and successfully reunites with her.
Paul initially harbors a secret romantic interest in Diane, which evolves into a genuine relationship complicated by potion interference.
Jeff is one of Paul's close friends who supports him throughout his potion-related adventures.
Madame Ruth acts as a professional potion maker and guide who provides Paul with both the problem and the solution.
Cheryl is a former rejection target who becomes the subject of Paul's spiteful potion experiments.
Marisa transitions from a sex worker to a thief who exploits the potion's power against Paul.
The motorcycle cop represents an authority figure temporarily neutralized by the potion's effects.
Explore the full interactive character relationship map of Love Potion No. 9