The following is a list of characters from the Japanese manga series Gunslinger Girl.

Set in modern-day Italy, the series revolves around the Social Welfare Agency, a government-funded organisation which is supposed to provide advanced medical care to those in need. This, however, is a cover for a far different agenda: the patients, adolescent girls who have survived traumatic events, are brainwashed into forgetting their past, turned into cyborgs, trained in the use of weapons and used as assassins to battle enemies of the State. Each girl is assigned to an adult whose job is to provide the girl with training and act as a mentor and authority figure. The relationship between the cyborg-girls and their "handlers" forms the basis of much of the plot and varies from the affectionate to the indifferent with varying degrees of results.