Create a loose, casual sketch page of the black cat character 'Luna' based on the reference images. Bright white background. Freely arrange drawings in various formats: full-body sketch, close-ups of the face, small doodles, quick figure sketches, and Chibi style versions. The page should convey the lazy, cute, and slightly grumpy mood and personality of the black cat. Do not make it look like a neat character sheet or official model sheet, make it look like a spontaneous, messy sketchbook page. Style: loose casual sketch, no decorative elements, black ink or pencil on white background.
