Purple People Eater

Twelve-year-old Billy is curious and exuberant, quickly forming a bond with the alien Purple. He dreams of a rock-and-roll future and uses his new friend to explore music and courage, while protecting his sister Molly. His quick wit and loyalty to family drive him to take action to save Rita's home and rally the neighborhood.

Sam is Billy's grandfather, a warm, practical guardian who supports Billy's music dreams while navigating a tough housing situation for Rita. He mentors Billy and helps organize the charity concert, balancing humor with responsibility.

Molly is Billy's younger sister who bonds with her grandfather and friends, sharing in the adventures sparked by Purple. She observes the adult world with curiosity and contributes to the family’s determination to keep their home.

Rita is the longtime resident at risk of eviction who inspires the community to stand up for their elders. Her birthday scene becomes a catalyst for the town to support her and others facing displacement.

Allison is Billy's friend who promises to keep Purple's alien secret, highlighting the trust and secrets that test childhood friendships. She becomes part of the inner circle supporting the characters' plan to help Rita.

Donna is Billy's nosy neighbor who learns about Purple and witnesses the concert plan, adding tension and demand for transparency in the neighborhood. She helps or hinders the plan depending on the scene's needs.

Ken Noodle is the greedy landlord pressing eviction and trying to derail the benefit concert. His actions provide the film’s conflict and highlight the struggle between greed and community care.

Dad is Billy's father (or the parental figure left with Billy and Molly during the trip). He is mentioned as part of the family dynamic that shapes Billy's responsibilities and values.

Purple is a one-eyed, one-horned alien who befriends Billy and loves classic hits. The alien can only access Earth music after learning radio waves take 25 years to reach his planet, which becomes a key plot device and a symbol of unconventional friendship.