Allomancy
Allomancy is one of the three magic systems in the Mistborn fantasy novel trilogy, and is the most prominent. People capable of Allomancy are known as Allomancers. Allomancers have the ability to "burn" (or use) metals, in order to fuel a variety of physical and mental enhancements and abilities. For an additional burst of power, they may flare, or burn their metal especially quickly, consuming it at an accelerated rate, but gaining greater benefits in return. A person who can only burn one metal is known as a Misting. If a person is born with the ability to burn more than one metal, they can burn all Allomantic metals, and are known as Mistborn.
There are 16 metals that Allomancers are able to use: 8 basic metals (4 base metals and 4 alloys) and 8 Higher metals (4 base metals and 4 alloys). All these metals must be pure when ingested, and the alloys must be mixed to specific proportions. If the metals are impure or mixed wrong the Allomancer could become very ill or possibly die.
The Allomantic metals come in four groupings of four metals: Physical, Mental, Temporal, and Enhancement. Each of these four groupings has two base metals and their corresponding alloys, which in turn have a related ability. Each metal produces an Internal or an External, an Push or an Pull effect.

Feruchemy
Feruchemy is the second magic system in the series. Feruchemy works differently from the other magics. While an Allomancer burns metal to gain power, a Feruchemist can use these sames metals as holding units, or minds, to store up their own power. Basically, depending on the metal, a Feruchemist can become worse at something in exchange to be equally better in the future. No power is gained or lost.
The major strength of Feruchemy versus Allomancy is the speed at which one can access its power. While a Feruchemist must provide the power for the magic from himself, storing it over time, an Allomancer can simply consume metals to power the magic. However, an Allomancer has limits to how much power they can draw at once; a Feruchemist can draw out the power of the metalmind with virtually no upper limit, exhausting it in one massive burst if they so choose. For instance, a Feruchemist tapping a pewtermind can be far, far stronger than even a very powerful Mistborn burning pewter, if only for a short time.

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Lysaria is a Twinborn, a person who has one Feruchemical power and one Allomantic power. She has to power to 'burn' iron, revealing blue lines that lead to her chest. With them, she can 'Pull' on the lines, which lead to metal. Physics still apply; if the item is larger, she goes towards it, if smaller, it comes to her, and if equal, then both move about the same distance. Mistings who can burn iron are know as Lurchers.
As a Feruchemist, she can store fortune, or luck, in a metal called chromium. While storing, Lysaria becomes unlucky, and when tapping, the opposite happens. Ferrings who use chromium are called Spinners.

As a person, Lysaria lives the life of a Twinborn and a courtly lady. Having her powers has given her freedom, she can be both polite and cutting, depending on the situation. For the most part, she is what is described as a 'tomboy', though the word has not gained significance where she comes from. Adventurous, brave, a bit short-tempered and sometimes foolish.

She wears a mistcoat, essentially a jacket with long swirling tassels, occasionally. Otherwise, she usually dressed in a late 18th century style suit, rather than a dress. After all, it's hard to move in one of those. She carries a flask tied to her belt, filled with whiskey and iron shavings. Lysaria also carries hip holsters that holds two Sterion 36's, six-shot revolvers modified to carry various types of bullets. A steel plate is worn on her chest.

Lysaria has long, wavy, blonde hair, which is pulled back into a ponytail when on official business. Her eyes are chocolate-brown and she stands at about 5'2, making her a fairly small target. She is fair enough, as far as looks go, though for the most part tends to hide anything that would get her noticed overtly.