Marcy is below average hight yet still taller than Murphy and very thin, with oversized glasses. Her mouse-brown hair was thin and straight. Her hair hung to her chin cut evenly all the way around. Marcy looked like she could by blown over by a strong wind.
Marcy is a grey-brown wolf when in wolf form. In her wolf form she is smaller than Will and has brown fur.(reference needed)
Marci leaves the Alphas after she got her degree and sets off to make a life in the regular human world.
In the seriesEdit
In Fool Moon, she's in the back of the van that Susan Rodriguez is driving the Alphas in, described as having mousy-brown hair. William Borden reminds Murphy that she was in the pit with them on Marcone's estate during the Loup-garou attack. Tera West comforts the Mousy-haired girl in wolf form.
In "Aftermath", Marci and Andi Macklin have been keeping the pregnant Georgia company while Billy is out of town. When Andi and Georgia are kidnapped, she, Karrin Murphy, and Billy free them. It is also mentioned that Andi and Marcy "had kind of a thing in school" but it didn't work out.
In Summer Knight, as she is getting anti-glamour ointment applied, Marci (unnamed here, only described as petite, with mousy brown hair), while she holds a dress to cover her naked body, complains that Andi has been impossible all year because her new slim and beautiful looks.
In Ghost Story, Marcy attends a meeting of the Chicago Alliance. Harry Dresden recognized her as "Marci" from the original Alphas. During the meeting, when Felicia threatens to reveal the location of two Swords of the Cross, she positions herself ready to pounce on her.