Gwen is of about average height for a woman, with long brown hair and hazel eyes. She is eighteen years of age, though carries herself with the grace and dignity of someone of either greater years or impeccable manners. Her body has blossomed into the full curves of womanhood, something she occasionally flaunts (though typically only on special occasions).

The heiress to house Blackfin is meticulous, precise, and organized. She takes a great deal of interest in the running of the details of her house's inner workings, and seems to be quite adept at both running a household and keeping track of its finances. Her attention to detail is apparent in her personal appearance as well, as her hair, jewelry, and clothing are all worn precisely as Gwen likes. This does lead to an excessive amount of time in front of mirrors and other reflective surfaces.

She is almost always accompanied by a large, black dog named Daisy. Stories/Rumors of what happens to those that touch Gwen without Daisy's permission generally focus on lost body parts.