Jem (Lead Vocals) ? Jem is the leader of the Holograms and the most popular singer of her day. She is the alter-ego of Jerrica Benton, owner of Starlight Music. Jerrica also runs Starlight House, a home for foster girls. Using the power of Synergy, an incredibly powerful holographic computer with extremely advanced audio/visual synthesizer technology, Jerrica can become Jem by touching her special star-shaped earrings (the "Jemstar earrings") while saying "Showtime, Synergy" (Jem changes back to Jerrica by saying "show's over, Synergy"). A primary storyline of the series involves her hiding her identity from others, especially Rio Pacheco, who loves both Jem and Jerrica.

Kimber Benton (Keyboards, Synthesizers and Backup Vocals) ? Kimber is Jerrica's younger sister. She is the primary songwriter of the Holograms. Episodes in which Kimber is the main focus often involve romance and rebellion. Kimber, more than once, has been shown to be a little jealous of all the media attention that Jem gets. Kimber is also a hopeless romantic, who seems to fall in love at the drop of a hat.

Aja Leith (Lead Guitarist and Backup Vocals) ? Aja is a Asian-American foster girl who grew up with the other Holograms at Starlight House. She was the first one adopted by Jacqui and Emmett Benton, Jerrica & Kimber's parents. Naturally handy and a sports fan, Aja is cool and level headed. She is the girlfriend of Craig Phillips, the brother of the Misfit's keytarist, Stormer. Aja is almost always the driver of the Rockin' Roadster.

Shana Elmsford (Synth Drums, Bass Guitarist and Backup Vocals) ? Shana is an African-American foster girl who grew up with Kimber, Jerrica and Aja at Starlight House. Despite her shy demeanor she eventually became good friends with the other girls. She designs many of the Holograms' costumes and even left the band for a short time, wrongly assuming the others wanted her out of the band for good, to pursue a career in fashion as a designer for actress Liz Stratton. However, when Stratton's unreasonable demands and egotistical behavior became too much for Shana to take, she walked off the job and returned to the band, where she learned that the girls never wanted her out, they just wanted to see her fulfill her dream of being a professional designer. She switched to playing the bass guitar with Raya taking over on drums.

Carmen 'Raya' Alonso (Synth Drums and Backup Vocals) ? Raya is the talented Hispanic-American drummer of the Holograms. Quiet, kind and unassuming, Raya won the position of drummer for the Holograms during a nationwide talent search, beating close competitor Craig Phillips (Stormer's Brother) in a drum duel. Raya is the only member of the Holograms who comes from a traditional family.

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The Misfits

Phyllis 'Pizzazz' Gabor (Lead Vocals and Guitarist) ? Pizzazz is an archetypal spoiled rich girl. Abandoned by her mother when she was a child, Pizzazz was raised by her tycoon father and given almost anything her heart desired. She is the primary antagonist on the show, constantly trying to upstage Jem and the Holograms. She has been shown to be attracted to Rio (Jem/Jerrica's paramour), Sean Harrison (British teen idol and Kimber's on-and-off boyfriend), and Riot (of The Stingers). She despises her real name "Phyllis" and is prone to fits of rage if things don't go her way.

Roxanne 'Roxy' Pellegrini (Bassist and Backup Vocals) ? Roxy is the Misfits' tough-as-nails bassist. A high school dropout, she was almost completely illiterate until one of the Starlight girls, Ba Nee, gave her a kid's book to learn to read. She takes an instant dislike to new Misfit Jetta, and the two are often at odds with each other.

Mary 'Stormer' Phillips (Keytarist and Backup Vocals) ? Stormer is the primary songwriter of the Misfits and overall creative force behind the group (though she is almost never given credit for it). She is a world-renowned guitarist and expert Keytar player. She is sweet-natured and compassionate, and often pushed around by the other Misfits. She and Kimber forge a friendship when both women, feeling unappreciated by their bandmates, strike out on their own, join forces, and record an album together. Though Stormer eventually returns to The Misfits (and Kimber to The Holograms), she does so with new-found self-assurance, and remains friends with Kimber. Stormer's underdog demeanor and gracious attitude has made her one of the best-loved characters in the series.

Sheila 'Jetta' Burns (Saxophone and Backup Vocals) ? Jetta became the newest Misfit when Stormer suddenly heard music, particularly a "powerful" saxophone, blaring in a seedy dance club. Jetta, a conceited, pathological liar, is originally from Hull, England and comes from a poor family; despite this, she likes telling people her family has close ties with British Royalty. She is also a skilled pickpocket. Extremely perceptive and stuck-up, she almost immediately begins a rivalry with Roxy.

Eric Raymond ? Eric is the main villain in the series, a greedy and manipulative music executive who was running Starlight Music at the time of Emmett Benton's death. Shortly afterwards, his main focus was to gain back full control of the company, half of which was left to him, and the other half left to Jerrica. Eric is not a member of the Misfits but created the group in an attempt to oust Jerrica. Afterwards, he runs Misfits Music (with Pizzazz's father's money) which is later renamed Stingers Sound when he signs new band The Stingers. Handsome and extremely devious, he is a very smart and savvy (albeit dishonest) business man and will resort to almost anything to sabotage Jem and the Holograms; from fraud, to hiring goons to do the really dirty work, to passing out wads of cash to total strangers on the condition they use the funds to purchase Misfit albums. He also longs to know Jem's true identity, even going so far as to offer new Hologram Raya a music contract if she reveals to him Jem's secret. T

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The Stingers

A new band introduced in season 3

Riot/Rory Llewelyn (Lead Vocals) ? Riot grew up in a strict household with his mother and army officer father who tried to force his values onto him. To escape his father's stronghold, Riot joined the army but went AWOL in Germany where he met Minx. Rapture soon joined and The Stingers were born. Riot is charming but aloof and arrogant. He is confident with his looks, believing he is the perfect man. He commands respect and demands devotion from his bandmates and fans. He is aware of the power he has over people and uses it to get what he wants. Riot's romantic interest in the show is Jem - he believes she is the perfect woman for him and pursues her relentlessly. His relationship with his father was deeply strained over the years, but due to his mother's temporary illness and the efforts of Jem to reconcile them in the episode, Riot's Hope, their relationship has greatly improved. T

Rapture/Phoebe Ashe (Guitarist and Backup Vocals) Rapture is a con-artist and uses her interest in the occult to trick people out of money. She enjoys making fools out of people for her own entertainment and will quickly discard them once she has had her fill of fun. Rapture is arrogant and self-centered but will take orders from Riot on a business level - she knows all too well that his charm and charisma will take him places where she wants to go too. She has no romantic interest on the show.

Minx/Ingrid Krueger (Synthesizers and Backup Vocals) Like the other members of The Stingers, Minx is arrogant and only interested in herself, but will take orders and advice from the charismatic Riot, as she knows he is a man with a future and she wants to be there when it happens. She is cunning and manipulative, and prides herself on being able to have her pick of men, only to toss them away once she gets bored, which happens with alarming regularity. Minx is also very technologically-minded and can work wonders with any computer or synthesizer. The only character in the show that she shows any genuine affiliation towards is Techrat, due to his similar interest in computers. Her romantic interest in the show is Rio, whom she teases and flirts with despite his constant rejections. She sees him as a challenge because she can usually have any man she wants.