Daniel Dyer is the older brother of Mara and Joseph Dyer. He first appears in The Unbecoming of Mara Dyer. He is a supportive older brother, although he and Mara usually tease each other.
He is described to have a dark complextion and dark hair, according to Mara he resembles their mother.
Mara is Daniel's younger sister. Mara has a close relationship with Daniel and refers to him as 'Mr Perfect'. He often teases her over the course of the books. Daniel is very protective of his younger sister and is also supportive.
Joseph is the youngest of the Dyer children. He and Daniel's relationship is an average brother relationship. Throughout the book it is said that Joseph looks like Daniel.
Despite Noah being Mara's boyfriend, Daniel and Noah get along well, much to Mara's disliking.