I used Copic alcohol markers for my background and then did the line work with Ohto Graphicliner and Golden's Titanium White Acrylic to add highlights (which makes this a Mixed Media piece, I think). Done in a 7 x 7 in. Stillman & Birn Delta.
Sorry that it's so blurry at the bottom. I do a lot of mixed media in this sketchbook and I can't get the pages to lie flat for scanning.