sirius'sbrother
Something hit me when i finshed the book nothing has been revealed bout Lupin or his family so i thought i make-up something. In the 6th HP book Lupins younger brother can come join hogwarts. Some how he is in his 6th year he has nice silver hair, bright yellow eyes, he also is a werewolf, he is bout 5'9", he joins the Gryffindor makes friends w/ harry, ron , hermione , and ginny. He really likes the dark arts and really proves usefull to harry and his fight with the dark lord. well tell me what u think love to hear from u 
