Au: James has a younger brother, one who's not quite as Gryffindor as he is. Marius Potter is not his bother, despite appearances, but he will do anything to help him. Warning: Lots of politics, a bit of canon changing, and some graphic content. T for language

Robert Cygnus Potter was the man who stood against Dumbledore and Voldemort, his won faction in the war. He spent ten long years in exile, isolated from his only surviving family. And now he's back, and he's going to make all the difference for the boy who lives in the cupboard under the staircase at number 4 Privet Drive.