Makenna is the descendant of a Maltese family with a unique link to vampirism. Some members in her family have become vampires throughout the millenia to protect and provide for the family. Makenna was one of the chosen ones. She looked forward to her destiny until she met Charles in Barcelona.
Charles was born in the early 20th century of Denmark. In his early twenties, he moved to Barcelona to study law. There, he met and fell in love with a Maltese woman named Makenna.
Makenna and Charles met when he was a law student in Barcelona and fell in love. Makenna's ancestor, Luca, told her that she could abandon her destiny of becoming a vampire if she wanted a normal life with Charles. However, she still chose immortality. Before she left, she promised Charles that she will return. Makenna waited for her newborn year to pass while Charles waited for her return.
After she left her newborn state behind, she found Charles again, who was still waiting for her. After telling him about life as a vampire, Charles decided to join her. They waited 3 years for Makenna to practice her self-control to avoid killing him by accident.
After he was successfully changed and found out about his power of lie detection, they lived a nomadic lifestyle together, but Makenna still visited her family often.
Makenna and Charles are invited by Renata to join the confrontation between the Volturi and the Cullen family and their witnesses in Breaking Dawn. When Charles 'confirms' that the Cullens are innocent, he and Makenna take their leave.