HistoryCassandra is Charles's "evil twin", his equal and opposite in every way.
Early YearsCassandra is what the Shi'ar call "mummudrai", the spirit that is the equal and opposite of a person. However, due to the amazing genetic potential of Charles Xavier, his mummudrai was able to create a physical form, effectively a twin. While gestating in her mother's womb, Cassandra was recognized by Charles as his evil alter ego, and he preemptively tried to kill her with his nascent psychic abilities. Cassandra was barely able to defend herself, and the shock of the roiling battle caused a miscarriage of Cassandra's fetus. Though the doctors pronounced her stillborn, Cassandra in fact survived, and spent the next thirty-plus years as a growing mass of cells in a sewer, building a new body for herself, and planning her revenge on her brother.
X-menCassandra took control of Charles's mind and sent him into a type of coma. She reformed her own mind so that it was impossible to tell the difference between herself and Charles. She then dumped his body into Cerebro to waste away while she sent his precious X-men on suicide missions.
One such mission was to kill the Justice League. During that mission "Charles" was killed. Although the X-men prevailed, they were extremely distraught at what they had done and their faith in their former leader was shaken. Cassandra revealed herself as the new headmistress, the school having been left to her in a false will. She also introduced the X-men to the Kingmaker, who offered them their hearts' desires. She hoped this would appease them for a time. And it did. In fact, Cyclops wished for the X-men to have never killed the Justice League (why he didn't wish for the mission to have never been done was not revealed).
Cassandra remained as headmistress for a time, where she cultivated a relationship with the Three-in-One and Windrider. However, the Three-in-One eventually discovered Charles's body in Cerebro and turned on Cassandra. In an epic astral battle, Charles was freed and returned to his barely-alive body and Cassandra's psychic form was locked in the Z'noxx Chamber, a place that is psi-proof.
RevengeCharles found himself under attack by a Bizarro-ray and a spell from Mad Katz. When the Juggernaut attacked and nearly killed his body, he decided enough was enough and his soul abandoned the body. The Scarlet Witch bound his soul to a suit of armor until she could reform a body for him.
Yet something urged Charles to find a new body NOW. His strange impatience demanded that the Three in One and their Phoenix fragments join him in the Z'noxx Chamber with the Green Lantern and create a new body. Having completely forgotten about Cassandra, the group opened the chamber and she escaped.
Change of HeartCassandra was recruited by Alter to join the Exiles and defeat the Timebreaker. When Jade returned, she was pleased to find Charles Xavier's "evil twin" present. Jade and Cassandra both had plans to use each other to destroy Charles, but those plans were put on hold. Cassandra was molested early on by Deadpool and chose to give herself a new identity with the DNA she had absorbed from Windrider: she now appears as a 30ish red-headed temptress, dressing in black Victorian fashion.While on the missions, Cassandra found herself genuinely enjoying saving the various worlds and flexing her powers alongside other powerhouses Superboy and Sylar. She actually forgot her "true" mission from time to time (to kill every Charles that she came across).
Dark Green RingUntil the Timebreaker forced the dark green lantern ring on her. His will warred with her own. He showed his cards early, forcing her to her knees to worship him and obey. Cassandra helped defeat him, but her attention was torn between defeating the Timebreaker and killing her brother. She eventually went after her brother, throwing them both into the singularity of the Negative Zone. Cassandra wound up in the Ultimate universe a mere week after the Ultimatum events. She tried to recruit that world's Karan Creed, but the woman refused.</h3>
MummudraiCassandra is what the Shi'ar call "mummudrai", the spirit that is the equal and opposite of a person. However, due to the amazing genetic potential of Charles Xavier, his mummudrai was able to create a physical form, effectively a twin. While gestating in her mother's womb, Cassandra was recognized by Charles as his evil alter ego, and he preemptively tried to kill her with his nascent psychic abilities. Cassandra was barely able to defend herself, and the shock of the roiling battle caused a miscarriage of Cassandra's fetus. Though the doctors pronounced her stillborn, Cassandra in fact survived, and spent the next thirty-plus years as a growing mass of cells in a sewer, building a new body for herself, and planning her revenge on her brother.
AlliesCassandra adores Karan Creed and the Three-in-One even if they don't feel the same. She has a "working relationship" with Sylar, however neither would hesitate to kill the other if they felt weakness -- it keeps them on their toes.
EnemiesMost anyone she meets, but Charles Xavier and in his X-men in particular!
PowersCassandra possesses telepathy comparable to Charles Xavier. After copying the DNA of Charles Xavier, the mummudrai Cassandra Nova accessed the full spectrum of latent mutant functions in his genome (this means she has the powers of Charles Xavier, the ones he could have had and the ones he might receive, as a result of latent mutation), granting itself vast psionic powers. These powers include: telepathy, telekinesis, and the ability to release an astral form, which she focuses both her telepathy and telekinesis. She has all the powers of the "average" mummudrai as well.DNA Duplication: able to copy the DNA of sentient beings and use it to construct physical bodies for themselves. Also capable of accessing the full spectrum of latent mutant functions in ones genome. Unearthly (it takes her 3 hours to completely copy someone's DNA)
Astral Form Projection: ability to release her astral form, which she uses to focus her telepathy and telekinesis.
Telekinesis: possesses telekinetic abilities enabling her to levitate and manipulate living beings, inanimate objects, and to some extent energy psionically. She can levitate herself or other persons or project a telekinetic shield capable of withstanding missile blasts. By focusing her mental energy at a specific target, she can release devastating force blasts. Incredible.
Roleplaying StatisticsCHARACTER INFO:[Cassandra Nava]
STRENGTHS: Resist Domination, Genetics
WEAKNESSES: Power hungry. Will abandon any mission at the chance to kill Charles. Not physically strong or well built.