There must be some reason behind Detroit’s bad luck in the last three-plus centuries. We have the explanation: Du Nain Rouge in French, or the Red Dwarf in English. Legend has it the creature has been spotted whenever something really awful happens. And now, some fun-loving, creative types in this city have turned it into a Mardi Gras-like celebration. We talk with Francis Grunow, co-founder of Marche Du Nain Rouge; and Janet Langlois, a retired folklore expert with Wayne State University’s English Department.