Due to the nature of Vanessa's powers she was in private, isolated, tutorship with a magi specialized in demonic presences. After she had five demons siphoned it was clear that she took more than their power. With their personality and much of their strength, poor Vanessa had to deal with the demonic urges and willingness to do horrible things to other people. With training, and control, Vanessa was able to develop her own willpower and even more so her sense of self. That was key, learning to isolate what was Vanessa and what was demon.
By the end of the three years of isolation, she knew far more about her own powers. Demons were especially targetable by her but so could any other extraplanar being or item be targeted. An ancient magical artifact or a being from another dimension linked to magical planes, she could utilize the same abilities. She no longer needed materials to draw runes or wards she could even draw them in the air in defensive motions if she needed but more importantly she could burn the ground with hellfire.
She's still a 16 year old girl, powered by urges and evil desires that no teenager ought to have to deal with. And yet, she's able to live her day to day life. Once that was finally true they shipped her out of isolation and back into society, well, a society, at Coral Springs High School. Her and her demons were shipped off and warnings came right along with her.
Magic Siphoning:
The one power that Vanessa actually has is the ability to seal and siphon magical energies. This links her to whatever object of power or being of power and grants her not only some of their magical energies and abilities but also some of their personality. For beings or objects of great magical strength she might only diminish their powers and only gains some of it then, but especially with those of great power it has still a great influence on her personality.
Demonic Powers:
Immunity to Fire, and Hellfire:
One of the demonic entities that Vanessa has sealed is a guardian demon in the shape of a dog. This demonic entity suffers no ill effects from fire and is resistant to any of the side effects. From fire that might be immunity to heat exhaustion or inability to breathe.
Demonic Toughness:
Demons are very hard to kill with normal weaponry. You can stab them, shoot them, and they seem to rise back up soon after. Vanessa has inherited this ability from an Erinyes that she has trapped. This has given her incredible resistance to normal mundane weaponry. Although most weapons will still hurt her and cause her body harm, but it takes more to stop her and she'll heal over time the physical damage.
Hellfire Claws:
Vanessa is unable to manifest fire bolts or hellfire and brimstone but her blood courses with Hellfire. When she rakes her fingers across something she is able to burn it with hellfire. Hellfire is a magical fire attack and right now can only be concentrated into her hands to attack like claws.
Fiery teleportation:
Vanessa is able to blink around through space to anywhere she has been before or anywhere that she can see. When she teleports she leaves behind a fiery pentagram and before she arrives. It is possible that she could take others with her but she travels through the underworld during the process. Anyone of weak will, or anyone not carrying some resistance to heat will suffer the immense pain of hell, but only for a moment thankfully.
Demonically Attractive:
The quirk of her Unnatural Beauty comes from an imp of gluttony that she sealed first. She cannot gain weight, she is supernaturally attractive especially to divine or hellish beings but also towards mortals. There is something about her that makes her seem Too Attractive that might key in people to her demonic source of power. That said, this is not so overwhelming to make someone instantly fall in love with her, she's certainly alluring to most, but it will definitely make her memorable which means she's unable to get away with being anonymous in most situations.
Wards:
As an adept mystic, Vanessa is able to create circles of power where allies are protected or more powerful and enemies are weakened. She is able to focus these things and actually entrap specific beings or people in a circle of magic. This takes a great deal of time the larger and more powerful the circle. She could, with enough time, protect an entire sky scraper with the runes, but it might take her a full year of covering the building with magic symbols. These are not things she can cast in the midst of combat other than to siphon power, and even that requires touching her victim long enough to draw magic symbols.
Sideeffects: These occur regardless of which demons she has siphoned from.
Demonic Senses:
Due to her connection with demons she can see in complete and total darkness. Overall, however, the biggest thing is she can detect other demonic beings even if they are possessing someone.
Demonic presence:
The character is detectable and noticeable through any sense that can also detect demons. In a plane of demons, such as hell, she might just blend into the background of other demons, but on earth? Sore thumb.
Weaknesses:
Personality Siphon:
Vanessa suffers from various personality flaws due to the demons that she has bound.
Zeke: The first demon that Vanessa sealed gives her the unnatural beauty that she possesses and also a glutton's desire for food. Although she won't ever gain weight from eating too much, all that weight will get added onto her should she ever lose her connection with Zeke.
Talia: One of the Erinyes, she is filled with hatred of Vanessa and this translates into wanting Vanessa to get hurt and to suffer for trapping her. This personality trait tends to show up by Vanessa recklessly entering dangerous situations that are knowingly or highly likely to cause her pain or suffering.
Grunth: A portal guardian demon similar to a hell hound, makes Vanessa quite aggressive over the things she wants to protect. Whether that's a lucky necklace, a letter she holds, or a person, it won't matter. Anger and rage more easily fills her should that object of protection be attacked or threatened.
Bal'lak: A fallen angel that was banished to Hell. He retains some of his angelic abilities such as teleportation, where Vanessa gets it, but he also has a sense of justice. This has been corrupted and he seeks to punish those who create injustice by their actions or negligence. This is where Vanessa gets her heroic sense of saving others, but also why she may go too far when punishing those who caused her to take up heroic actions.
Baal: Not to be confused with the Devil-Himself, but still takes on some of the traits of the great trickster. Vanessa is addicted to gambling, and high risks with the possibility of high rewards. It would be very difficult for her to resist gambling or taking the odds, should it present itself even at inopportune times or for things she shouldn't be gambling (like letting a criminal escape by winning a game of poker).
Demon Weaknesses:
Vanessa also has all of the traditional Demonic weaknesses. Powerfully blessed or divine artifacts burn her in a way that her immunity to heat does not protect her and it can actually leave scars for long periods of time. In addition to that, it is likely that divine weaponry is one of the ways to quickly destroy her as it would completely bypass her demonic toughness.
Wards, circles of powers, holy incantations and other runes specifically blocking or caging demons and devils are also equally as effective against her. Granted she's a very powerful mystic when it comes to wards, so she might be able to find a way out, a sufficiently powerful spell will block her just like another demon. Banishment and exorcisms are the exception to this rule as she's neither possessed nor from another plane of existence.
Vanessa was born on October 1st, 2001. On that very same day a blood moon was in the sky and her parents were warned that such tidings meant their daughter would be cursed. Since her family had no history of abilities and magic is still something often misunderstood, they paid no mind to the warning. Besides, who listens to gypsy women in a hospital? Aren't they supposed to stay at the carnival?
Nessa's powers were present from the very first day she was born. They went unnoticed because, as would be later revealed, her powers are linked to siphoning magic from things from the beyond. So, Nessa would grow up like any other girl, but something tickled her mind when it came to mythology and especially the darker stories of history. She showed that she was unusually bright, her intelligence would allow her to skip grades had anyone been paying attention in the small town of Yreka, California.
It was away from school that Vanessa started to get her other education. She started to look at the afterschool gambling that happened, pennies and nickel games, for her math skills, and she started to learn about ghosts, goblins and things that go bump in the night from the local goth girls. She would trade her cooking for money to gamble with and she'd use what she won to buy books from the goths and later from the library.
This was how it was till she was 10 years old. That's when everything changed. She started to feel their presence, everywhere. Some people had people inside of them. Sometimes the voices people used to speak were not their own, there was an echo, a deep underworld echo, that others didn't seem to notice. In some of those books she had there were symbols, and some of them stood out from others, calling to her in a way.
The first time she tried a symbol she was beginning middle school and some girl she knew had something possessing her. Of course, it was unconcerned and detected nothing from Vanessa, and when her finger touched her shoulder she thought it was just to get her out of the way. Nessa had silver glitter on her hand, and she quickly drew the symbol of power. It took. The girl she drew the symbol on suddenly changed, turned fat and ugly, and she gained zits and her hair started to fall out. There was another creature, a small little imp like entity now sitting on the girl's bathroom counter. Zeke, is his name, and he's a demon of glutton, of excess, but also granted the person whom he possessed constant supernatural beauty.
This was the beginning. Vanessa started to leave school, and venture around where ever she could. People started to notice her growing into a very attractive young woman, when before she was just normal and a bit geeky. Skipping school was something that she did even more regularly and it started to get noticed. She defied her parents, defied the people coming to scoop her up and bring her back to school, and then Yreka was attacked by a full on demonic horde.
Well, it was a small demonic horde of 4 demons who wanted to cause havoc. The first one was a ballsy move for Vanessa. She only had some increased durability from the first demon that she had siphoned, the second one was strong and tough. Tougher than he was strong. Which was lucky for Vanessa as she was able to round up the other two by sheer defense than anything else. Though now she had 5 demons about, all shrunken and small, weak beyond belief, but still around. When the supers showed up and found her, she was immediately kept and put into 'private schooling'.