这是一张绘画频道的头像，采用扁平极简的墨水风格。一个做成大写 I 形状的黑色钢笔笔尖，带青绿色笔缝和一小滴青绿墨水，居中立在纯白底上，一个缩小了也读得出的符号。可以换成你自己的工具和首字母。

Create a finished 1:1 square profile picture for a drawing channel. Show exactly one rendered character: “I”. No channel name, captions, initials, labels, watermark, or other text. Build the capital I as a bold, custom fountain-pen-nib emblem: a tall, nearly symmetrical black nib silhouette with a sharp lower point, broad shoulders, and a clean central slit. Add a restrained teal ink channel and a small, crisp teal ink splash tucked behind the upper-right shoulder; keep the splash compact so the I remains the single dominant shape at 98 × 98 px. Use flat, precise vector-like shapes with crisp edges, high black-and-teal contrast, and no fine detail, gradients, texture, or shadows. Place the emblem centered on a pure white background, sized to occupy about 62% of the canvas height, with generous white space and all key shapes safely inside the central circular crop. Keep the silhouette instantly readable at avatar size.