Luisa was a mortal woman, the daughter of Anna Hidalgo and her fiance, Rafael, who was killed before she was born by Otavio Consone, a jealous Immortal. When Luisa was a girl, Anna, was struck by a hit and runner driver, leaving her crippled her for life.
At twenty-five, Luisa had grown up, and was keeping secrets from her mother. Luisa's new admirer was not introduced to her mother, and Luisa would not tell her his name. When the limo that had spirited Luisa away the night before appeared outside MacLeod's barge, Anna was appalled to see the man who had killed Rafael all those years ago emerge. She watched Luisa get out of the limousine, and seeing her with Consone was almost too much for Anna.
Within days, Luisa married Consone. He taunted Anna, for not only was he her now son-in-law, but it was he who drove the car that crippled her a decade before. He also suggested that his final revenge would be that he would shortly be a widower, Luisa could no more escape him than Theresa del Gloria, a previous wife, could a century ago.
He admitted to MacLeod that he murdered Theresa when he could no longer stand the fact that she loved the Highlander, and he found that intolerable. Luisa heard his confession of murder, and ran out of the house. Consone was mildly annoyed, but assumed he could still complete his revenge.
MacLeod then challenged and defeated Consone. When he went to Anna and Luisa later, he informed Luisa she was a widow. Anna said they would not ask any more, and gratefully kissed MacLeod's hand.