Button has a world-class intellect with a particular interest in nanotechnology. She has designed a power armor that is entirely composed of nanites.
Minerva "Button" Cagliostro was born into old money. Mob money to be precise, if the sources of the family fortune where to be traced back in history. By the time Button was born, however, her family had moved their money and investment into more legitimate areas of business. Razor Tech, the family's main business, is engaged in the manufacturing of parts meant for high tech industries.
From early on two things were very clear about Minerva. First was her intelligence. Minerva's physical development was absolutely normal but she was talking by the time she turned 8 month, reading by the time she was one, and already bored with high school by the time she was 10, even thought her parents sent her to the some of the most elite schools in the world. She proved to enjoy learning about almost anything but there was a clear preference for technology; biology, chemistry, electronics, computer science, she can't get enough of any of them. The second very clear thing about Minerva was the fact that she suffers from antisocial personality disorder. With the exception of her father she refused to obey anyone in her life, seeming to take a perverse enjoyment in finding the most convoluted ways possible to break the rules, frequently plotting to have others take the blame for her misdeeds. Thanks to extensive work by both some of the best therapists in the world and her father she at least has shown signs of understanding the need to at least live within the major moral dictates of a civilized society. Therapists and parents alike agreed that from a social growth perspective it was important for her to continue interacting with people her own age so she remains in high school even thought on the side she has designing doctoral level curricula for herself in bioengineering, nanoengineering, robotics, and a variety of other cutting edge technological fields.
Other than her studies (and complementing her studies) her other real area if interest is Japanese animation and regardless of what else she is doing there is an anime show running in the background. Her love of anime led to her learning Japanese, which her parents encouraged. It also led to her hacking Razor Tech's financial systems so that a certain small percentage of each and every transaction was siphoned off to an off-shore account she's opened with a falsified identity she created with that goal specifically in mind. With this money she also worked on designing a suit of power armor entirely composed of nanobots. Of course, anything like this is going to be discovered sooner or later. Once her father was alerted by Razor Tech accountants of what was going on he immediately worked through back channels to shut Button's little enterprise down. However, he was so impressed with her achievements he matched the money in her account with a legitimate account in her real name and encouraged her to keep working on her armor. As part of this training a transfer to Coral Springs was arranged; both to help her train the abilities the armor gives her and to place her in an environment where her tendency to get into mischief and the damage that comes along with it might be minimized, considering the school already deals with multiple children with powers and is used to handling the fall-out of the misuse of power, accidental or otherwise.
Nanomolecular Armor (Physical/Psychic): Button has no natural superhuman powers, unless one counts her intelligence as a superpower. Instead she is wholly dependent on her nanomolecular armor. Her armor is composed entirely of nanobots that when combined serve as a hybrid forcefield/ablative armor. They also allow her to stand toe-to-toe with opponents that would literally squish her without their help. The nanobots are designed to manipulate the electromagnetic forces in their immediate vicinity. Individually they have nearly no effect on their environment but their ability to manipulate energy and matter increases exponentially as their gather together. The nanobots are capable of extracting trace elements from the environment around themselves allowing them to slowly recreate themselves and 'heal' the armor.
Armored Strength: The billions of nanobots necessary to create Button's armor are able to enhance her strength to the point of being able to lift a couple of tons.
Armored Flight: The robots manipulation of the Earth's electromagnetic field also allow her to fly slight faster than the speed of sound (Mach 1.2).
Environmental Resistance: When formed into the armor Button's nanobots allow her to survive in some of the most severe environments in the world and even in the vacuum of space.
Psychic Resistance: One of the unexpected side effects of the way the nanobots interact among themselves and with Button's mind is that the energy field they form around her create a kind of psychic static providing her with protection from many forms of psychic attacks.
Armor Utility: Finally, the nanobots are attuned to Button's specific brainwave and operate on a proprietary OS which makes them night un-hackable and useless to almost anyone else. This feature also serves as a safeguard since any nanobot that finds itself too far away from Button simply stops working. Her mental command of the bots also allows her to command changes in configuration with just a thought, allowing her to create a variety of basic tools with them.
Energy & Magic Weaknesses: To achieve the size she was looking for Button had to make some sacrifices in the design of her nanobots. Chief among them, hardening. Any severe fluctuation in the energy fields around them can force the nanobots to shut down, causing damage to the armor and, depending on how severe the attack, to Button herself. So although an armored-up Button is extremely resistant to physical damage and to ambient fluctuations in energy and temperature she is particularly susceptible to concentrated, energy-based attacks. And magic… Well, Button is a very scientifically minded person so she never even considered magic into her designs so her armor has no way of countering magical attacks.
Emotional Cripple: Because of her antisocial personality disorder Minerva is unable to experience the normal human range of emotions. She has no empathy for other human being, and doesn't understand concepts like pity, mercy, or justice. Intellectually she knows the difference between right and wrong but for her it's just an intellectual concept which she really has no way of understanding.
Sooooo Boooored!: Minerva gets bored incredibly easy. The main motivation for anything she does in life is finding way to entertain herself which leads her to try a lot of things that can and do get her in trouble to one degree or another.
Tech Dependent: All of Minerva's powers and abilities are based on having her gear with her. Without her gear she's just your average, everyday super genius. Thankfully, this is rare since her nanobots can be configured to mimic jewelry of all kinds, although they are unable to provide her any of her armored abilities in this configuration.
Anime Super-fan: Button loves Anime and many of her designs are Anime inspired.