An unnamed woman was Roman Sionis' daughter.
At some point, Roman Sionis had a daughter.
Roman began wearing a mask as a gang leader as a symbol to mourn his daughter's death; when asked by the new Batwoman why he wore the item, he explained its origin and his daughter's death. Furthermore, Roman justified trying to kill the new Batwoman by saying that she wears the symbol of his daughter's murderer.
Ryan asked Luke Fox to use what information she had garnered about Roman's daughter to determine Black Mask's secret identity, but he could not, citing that the original Batwoman never killed a woman.