Lexine's ability enables her to absorb solar and other radiation to generate the process of ionized matter through a mentally-triggered unknown biochemical process so that it is converted to plasma, the superheated state of matter. Plasma is the state in which matter making up the sun exist.
Flight: Lexine can use her powers to create super-heated air currents which push her forward through the air, enabling her to fly. Sometimes this super-heated air is visible as a trail of flame behind her. The upper limit to the speed Lexine can achieve in flight is not yet known, although it is known to be greater than 150 miles per hour.
Plasma Emanation: Lexine can generate plasma temperatures of around 1,000,000 degrees Fahrenheit at maximum level. She can also use her power in a massive blast. However, Lexine has great control over her area of effect, enough to where one person may feel like they have been sunbathing all day to total incineration of another target.
Plasma Blasts: She has the ability to project the flames she generates as powerful blasts of energy.
Plasma Shield: She has the ability to manipulate the plasma around her to form an aura that can melt incomign bullets or stave off other attacks.
Heat Signature Sense: She has the ability to sense beings by the heat signature that they give off.
Solar Shielding Psi-Field: She is protected from the radiation she emits by a short-range psionic force field which automatically comes into being and also prevents excessive amounts of light from reaching her eyes that would blind or damage them. Lexine's body emits a protective field whenever she uses her powers.