Max Lightwood

Max is the adopted younger brother of Jace. He is also the younger brother of Isabelle and Alec. Being as young as he is, Max is often ignored and not invited into "adult" conversations. Max isn't really introduced into the series until the end of City of Bones. Max has a huge thing for comic books and thinks of Clary as a sister. Clary always gives him comic books and sometimes reads with him. In City of Glass something terrible happens to Max that stops him from being in the rest of the series.