Melvina MacGarlen once spearheaded a six-woman detective unit for the Galaxy Police Organization. She maintains a dignified, pseudo-aristocratic bearing, her concerned or serious expression a constant feature. This composed refinement extends to her specialized combat expertise as a fencer.

After the unit's initial disbandment, a new threat prompted the forcible recall of members, including Melvina. The reactivated unit operated under an external recruit, Collins, whose command began with trivial assignments before escalating to significant missions. During this period, Melvina participated in investigations targeting criminal activities linked to the entity Iyonesco, encountering groups like Defiant and the Vanessars.

Within the reactivated team, Melvina collaborated with members possessing diverse skills; however, her specific actions or evolution during these missions remain unelaborated. The unit collectively confronted complex threats: space-based doomsday weapons, internal conspiracies within their own organization, and psychological abstractions tied to Iyonesco's revelations. Information regarding her age, specific backstory beyond her leadership, or development outside this single series is unavailable.