How anonymous is the artist known as “Invader”? Interviewing him is “a bit like a toddler playing Peekaboo who covers his face thinking no one in the room can see him. Invader is clearly tall and slim, nearing 50, with thin lips and narrow cheeks that are peppered with graying stubble. He has clean, manicured nails. Tufts of dark and silvery hair creep out from under his cap. He smells of a freshly-finished cigarette.”