Helen Donnelly is the Donnelly brothers' widowed mother. She watches out the most for young Sean , but she fiercely defends all her sons, and turns a blind eye to their acts of revenge. While the boys feel she needs protecting, she gives hints of being much more capable and streetwise than they would ever guess.
Helen Donnelly: Get your brother.
Kevin Donnelly: [shouting] Yo, Seany! Dinner!
Helen Donnelly: I could've done that.