To enhance their natural abilities, they each wear a Hard Suit — each of them specialized in its equipment and performance according to the respective wearer's field combat role.
They were recruited by Sylia Stingray to battle the corrupt Genom corporation that dominates their home city of Megatokyo and which was responsible for her father's death.
She wears a blue and silver Hard Suit equipped with retractable sword blades in the forearms, laser cannons in the palms and wings for full flight capability.
Her primary business is the lingerie shop "Silky Doll" she personally runs, housed in her private building, Lady's 633, on whose top is also her penthouse apartment functioning as the Knight Sabers' base of operations.
In the spin-off comic Bubblegum Crisis: Grand Mal and the 2040 series, it is suggested that Sylia's brain was augmented by her father with Boomer-related technology, making her a human/Boomer hybrid.
In the Crisis series, her Hard Suit also combines with her Motoslave (a motorcycle that transforms into an automated mecha or an exosuit) to combat more-advanced Boomers.
After her boyfriend was killed and his death declared insignificant by the police (giving her a dislike for the law enforcement), she attempted to hunt down the killers, but she was recruited into the Sabers instead.
Priss' rebellious streak is tempered by a good heart and sense of humor, which may explain her ability to function in Sylia Stingray's demanding and disciplined operation.
She essentially serves as the hammer of the outfit—as opposed to Sylia's leadership and genius, Nene's tech wizardry, and Linna's sleek athletic precision.
Linna dons a green Hard Suit equipped with "ribbon cutters" - long, electrically charged nanomolecular ropes mounted behind the helmet that can be used to slash through Boomers and other high-tech opponents.
Working as an aerobics instructor, Linna once hoped to pursue a career in professional dancing, but her efforts in the trials went unappreciated by all but Sylia, who recruited her into her team.
Nene's blue and pink Hard Suit's offensive weapon is a weak laser gun unsuited for taking out enemies; instead, it is used to scribble the Knight Sabers' signature onto their scene of actions.
Nene is voiced by Akiko Hiramatsu in Japanese and Susan Grillo in English, with Hiroko Konishi and Hilary Haag in the 2040 series.
His sister Sylia tries to keep Mackie from becoming involved, but he helps the former Genom employee named Nigel at his rundown motorcycle shop and builds and repairs the team's Hardsuits.
Brian J. Mason is the primary villain of the first three episodes, a high-level executive in the GENOM corporation who killed Dr. Stingray and stole his Boomer technology.
[1] Most likely, he succeeded in transferring his memories into the ultimate Boomer, thus creating a God-like being able to vaporize three major GENOM branch towers in a single instant at will using a mental link with the USSD's particle-beam satellites.
Despite being killed by the combined efforts of the Knight Sabers in episode 6 of Crisis, Largo resurfaces to become the primary villain in the Crash sequel.
The Chief Executive and founder of GENOM, Quincy is an enigmatic old man who hides many secrets under the face of an unfazeable and ruthless businessman.
It is speculated by fans that he may have downloaded his personality into GENOM's main database; several clues to this are offered in the AD Police manga series.
In Bubblegum Crisis Tokyo 2040, Quincy bears the family name Rosenkroitz, and being confined to a life support system, is far less active than his OVA version.
Boomers designed for infiltration and combat are capable of appearing human, whether male or female, but tend to "burst" out of their synthetic skin in combat situations, revealing their true selves: large, metallic killing machines armed with built-in weapons such as lasers, machine guns, and arm blades capable of cleaving through a fire hydrant.
Because of her uncontrollable nature, Quincy Rosenkroitz of Genom used a bomb to cause the Great Kanto Earthquake in order to seal her underground and prevent her from contaminating boomers for her own design.
She is released from stasis by Brian J. Mason halfway through the series and rapidly matures from her childlike appearance to an adult almost identical to Sylia.
Near the end of the series, Galatea has Mason killed, and with her enormous power, becomes one with Genom Tower and brings it into outer space with the intent of annihilating the human race.
In the 2040 series, Leon is burlier and gruffer than his Artmic version, and initially more antagonistic towards the Knight Sabers because in his eyes they are soiling the honor of the A.D. Police by eliminating maddened Boomers before they can.
Nene's colleague (as an ADP Operator) and best friend outside the Knight Sabers; the two share a common interest in popular music and looking for a boyfriend.
The African American Chief of the AD Police (his name could be a mispronunciation of Todd) is a bad-tempered man who has to put up both with official restrictions and rebellious underlings, Leon in particular.
Appearing in Episode 2: "Born to Kill", Irene Chang is a young woman who goes to the same fitness club where Linna teaches an aerobics class.
Moreover, she is an heiress to the "Hou Bang", a powerful Chinese triad organization bent on destroying GENOM and the American firm Gulf & Bradley - both of whom are collaborating on a Super Boomer project.
Appearing in episode 8 "Scoop Chase", Lisa Vanette is the niece of AD Police Chief Todo and an aspiring photojournalist who sets her sights on exposing the Knight Sabers when she photographs a fight between them and a renegade Boomer and Priss smashes her camera to prevent her from capturing their activities on film.