Mercurial

As a young mother, Glenna Frost’s daughters Vivian and Lorelei meant everything to her. Though her teenage pregnancy originally prompted her to drop out of high school, her desire to provide a better life eventually lead her to complete her GED and pursue college, with her hard work and community service earning her a tidy scholar­ship to ECU. Frost divided her time as best as she could manage between her family and her studies—often with the help of her younger friend, Jessica Prentiss (unknown to her, the superhero Princess). Even­tually, the chemistry major applied for a summer in­ternship with KessKorp at Jessica’s urging. 
Frost secured the position, and once at KessKorp she worked hard, thankful for the job prospects—and the higher pay and family benefits those included—it af­forded her future. She kept quiet when her employers cut corners on employee safety, and about their unethi­cal and dangerous activities. Science demands risk and sacrifice, she justified to herself, just like the risks and sacrifices she’d made to come so far in life.
KessCorp’s shady practices left Frost working alone out­doors during a rare Emerald City thunderstorm, during which a bolt of lightning struck both her and a nearby vat of experimentally treated mercury. This somehow fused her body with that of the liquid metal, transmut­ing her into “living mercury,” but not without dire cost. Though rendered immune to the toxic metal’s deadly physical effects, her human mind was saturated in the heavy metal, severely affecting her mental state (above and beyond the shock and psychological trauma caused by her irreversible transformation).
As Mercurial, Frost uses her elusive form to plague Emerald City, surreptitiously appearing in vulnerable areas to sow disarray and devastation with little regard for human lives or property loss. Overwhelmed by emotional tumult, she is impossible to bargain with and difficult to capture as she inflicts the chaotic madness of her temperaments upon the world.

Physical Description

Special abilities

Mercurial’s body consists of pure mercury, with her mental processes somehow bound into the metal itself. She is free of mortal frailties like breathing, hunger, and almost all physical injury. Her form is both densely resistant to harm and extremely malleable, capable of traversing a convenient drain in a building’s plumbing or squeezing through the tiniest cracks in a vault door. She can drown victims within her fluid mass, as well as poison them with toxic mercury fumes or form her dense, fluid body into a variety of weapons—from swords and knives to chains and hammers. Mercurial sometimes disguises herself as silvery or chromed objects to evade notice or capture: mirrors, car bumpers, or even art deco pieces (though touching the object reveals it to be liquid).

Mental characteristics

Mental Trauma

Mercurial’s personality has become as ever-shifting and mutable as the substance her body is made of.

Intellectual Characteristics

The original Glenna Frost was loving and driven, if a bit overwhelmed and harried most days. Mercury is a potent neurotoxin, however, causing anxiety, memory loss, de­pression, and hallucinations that warp Frost’s understand­ing of the world.

Social

Contacts & Relations

Mercurial occasionally finds a kindred soul in other out­casts and victims of fate, like her fellow Emerald City vil­lains Pack-Rat and Junkpile.
She despises Princess for continually “meddling” in her life.