What is the song wrathchild by iron maiden about?

The song "Wrathchild" tells a story of a personification of wrath and vengeance, a demon-like figure who seeks revenge on those who have wronged them. The lyrics suggest the character has been through much pain, and as a result, they have become consumed by anger. The bridge of the song hints that this individual may be cursed or possessed by some malevolent force. The song features powerful imagery and metaphors to describe the character's rage and desire for retribution, such as "blood will flow" and "fists of fury". Some interpretations suggest that the wrathchild represents a personification of the darker side of human nature and the potential consequences of succumbing to intense anger and hatred.