Few Background Notes Edit
At the moment her background story is still in progress but I'm going to give you some info anyway.
Cassandra Devereux was the only child of a two well accomplished diplomats: British (mother) and American (father). She was born on American soil but raised in good old Great Britain; here she nourished her higher than normal intellect and flourished to be a talented, beautiful, and smart young woman that soon took her place into the world.
Right now she is Angel Falls' Vice Mayor, pretty much the power behind the throne dA:City Politics. Nothing that concerns the mayor's office happens without Cassandra's approval, either vocal or silent. You may think of her as an ascending Lex Luthor ... only with hair and tons over tons of sex appeal. She is not good or evil, she bask in the gray area where everything turns out as she planned and trust me on that, she is really good.
Cassandra doesn't have any kind of super power, she cannot fly, lift buses, she doesn't even handle a gun, but she is good with martial arts. She spent years between Japan and China to learn and master Aikido for defense, and Sanshou for brutal offense. She is highly intelligence; her IQ is 161 and thanks to her eidetic memory, you can't fool her; she never forgets a thing, which is both a blessing and a curse. Cassandra also has a very unique "power" if you want to call it that, a Psychic Void: it's completely passive, she never put herself even into understand it but it works: in short she is completely immune to psychic attacks or probing. You cannot read her mind, control her and if she is in the same room of someone mind controlled, some of her void washes over like an aura, weaken the grip of whoever is exercising control. She is aware of her power but she doesn't give it much weight, unless Tatiana Romanova is involved: Cassandra really loves to challenge her old friend on the same level.
Speaking of Tatiana Romanova a.k.a. Madame Darkness, she and Cassandra share a long past, a good taste in clothing and ofcourse pretty naughty stories too. She might have white silvery hair, but Cassandra is no angel
I'm not sure if in the future I will lead Cassandra to understand her gift and nurse it to a more active state. I would also point out that she is yes immune to psychic powers of any kind but it depends who exercise them: she is probably safe from 99% of humans but other creatures that range from aliens to demons to who knows what else out there, I'll have to decide, it might migrated to a mere strong resistance.