Monochrome Manga Character Design Sheet

Goal: Create a black-and-white manga character design sheet for {argument name="character name" default="a sharp-eyed shonen manga boy evolving toward a Kaiji-like style"}, with Japanese annotation text and multiple reference drawings on one vertical page.

Canvas: Tall vertical page, approximately 2:3 aspect ratio, clean white background, crisp black ink line art, professional manga production-guide layout.

Layout: Divide the page into a technical character-sheet upper half and three finished manga panels along the bottom. Use thin vertical divider lines and boxed callouts. The overall style should be monochrome manga with strong blacks, screentone, halftone dots, gray gradients, and dramatic high-contrast inking.

Main character details: Draw a teenage boy with a very angular triangular face, long pointed nose, small vertical black pupils inside inverted trapezoid eyes, stern expression, spiky jagged hair with large white and black zigzag chunks, slim tall body, high-collared fitted jacket, dark undershirt, narrow pants, and chunky shoes. His silhouette should feel like a battle shonen protagonist pushed toward a sharper gambling-manga look.

Upper section, exact visible elements: Include 10 discrete study/reference elements: 1 large front-facing head bust on the upper left-center; 1 close-up eye diagram at far left; 1 side-profile face/nose diagram below it; 1 line-thickness sample with two horizontal strokes; 1 small boxed side-profile hair/bangs study; 1 full-body front pose in the upper center-right labeled 「6頭身」; 1 full-body side pose on the far right; 1 vertical head-proportion guide with exactly 6 stacked oval head units between the two full-body figures; 1 screentone/gradation sample box with a horizontal gray gradient and 4 square tone swatches; 1 text box explaining monochrome tones.

Japanese annotation text: Add these labels in Japanese, placed as in a design reference sheet: 「逆台型の目 縦長の小さい黒丸」 beside the eye diagram; 「逆三角形の顔 とんがった鼻と顎」 beside the side-profile diagram; 「線の太さ」 above the line samples; 「外側の輪郭線：4mmペン」 beside the thicker line; 「内側の線：2mmペン」 beside the thinner line; 「髪型はギザギザで描く」 above the small hair-study box; 「6頭身」 above the front full-body pose; 「白と黒のツートーンとハーフトーンやグラデーションを使ったモノクロ漫画」 beside the tone swatches.

Bottom section, exact visible elements: Include exactly 3 separate manga panels across the bottom row. Panel 1 on the left: close three-quarter portrait of the boy looking serious in an urban street with tall buildings, smoky sky, and heavy screentone. Panel 2 in the center: dynamic action pose of the boy reaching one arm forward toward the viewer, dramatic radial speed lines exploding behind him. Panel 3 on the right: close-up side portrait of the boy looking determined against a cloudy textured background.

Visual style: Use clean vector-like manga linework but keep organic pen variation, thick outer contours and thinner inner detail lines, sharp geometric hair spikes, stark black fills, halftone shadows, grayscale gradients, and polished manga page composition. Avoid color entirely except black, white, and gray. Keep the page legible and instructional, like a professional manga drawing guide or character model sheet.