[] Sketchy Quartet Portrait

Create a "line and wash" illustration featuring clean, expressive ink contour lines paired with soft, translucent watercolor washes. The line work should define the major forms and details, while the watercolor fills add gentle, natural color with slight bleeding beyond the lines for an organic feel. Emphasize a hand-drawn aesthetic with a light, sketchy quality and a simplified background to keep the focus on the main subject. Content: four people are posing.