Seraphina is a central character in the novel "Seraphina" by Rachel Hartman. She is a half-human, half-dragon hybrid living in a world where dragons can take human form. Seraphina struggles with her identity and the societal tensions between humans and dragons, which are often marked by distrust and prejudice. Throughout the story, Seraphina's unique abilities and her connection to both species play a crucial role in the unfolding events. She becomes involved in a political intrigue surrounding the fragile peace between humans and dragons, ultimately seeking to bridge the gap between the two worlds.