Ben 10 is one of the most popular shows in Cartoon Network's history. This video from Drawing Now will teach you how to draw his iconic older sister Gwen Tennyson. Here are some instructions from the artist:
1. Sketch face from oval, then draw face details. 2. Draw body and clothes. Add cat as a motif on clothes. 3. After sketching is done now fill it with basic colors of skin, hair, clothes and green eyes. 4. Give outline by using pencil tool, then give shadow and highlights effect.
Original tutorial here.