Jeff Hagees is a brilliant engineer with a pronounced sadistic streak. Fired from his jobs for everything from thieving to insubordination, Hagees used his incredible pool-hustling skills to make the money needed to fashion his criminal identity as 8-Ball. 8-Ball knows full well that many people will laugh at his motif, and not take him seriously...which leaves them vulnerable to his killing them dead on the spot.
A twenty year-old dance major at Empire State University, Alyssa is one of Rick's closest friends. She grows increasingly worried about Rick as she sees him suffer, trying to get him to let her in so she can help him. Unaware of Sleepwalker's presence in Rick's mind, Alyssa merely seeks to help the man she cares about.
A demon from the Mindscape, born of an eternal cycle of hatred, malice, vengeance and despair, Cobweb is one of the most powerful entities inhabiting the Mindscape. Responsible for trapping the most powerful and skilled of the Sleepwalkers in Rick Sheridan's mind, Cobweb now uses his insane mind and twisted powers of illusion to spread havoc in the Mindscape, even as Sleepwalker struggles to return to the Mindscape to stop him and the other Sleepwalkers struggle to keep him at bay.
A twenty-one year-old English major at Empire State University, Rick Sheridan leads an ordinary life, until Sleepwalker becomes trapped in his mind. Rick's life begins to fall apart as he struggles with what has happened to him. Ashamed and confused, he tries to conceal Sleepwalker's existence from those around him, becoming isolated and depressed. Feeling like he has been afflicted with a disease like AIDS or obsessive-compulsive disorder, Rick is left to cope with overwhelming changes in his life.
An alien from the Mindscape, an otherworldy dimension that connects the minds of all living things, who patrols the Mindscape and defends the minds of the living from the attacks of demons and nightmares. Trapped in the Mindscape by his archenemy Cobweb, Sleepwalker is now trapped in the mind of human Rick Sheridan, manifesting in our world when Rick sleeps. Plagued by guilt and loneliness, Sleepwalker searches for a way home as he fights criminals and villains to protect the innocent as he did in the Mindscape.
The daughter of radical terrorists from the Weathermen and the SLA, Selena Slate is a worshipper of Che Guevara and his ideals of violent revolution. A devoted fanatic, she thinks nothing of kidnapping, robbing or bombing innocent victims to achieve her goals. A chance encounter with Sleepwalker would transform her into Spectra, who plans to use her powers to further the "revolution" and to destroy Sleepwalker for opposing her.