Avoid using photorealistic images or actual photographs of dogs in the banner. The illustrations should not be too detailed or anatomically correct, maintaining a simple and charming style consistent with the avatar. Refrain from incorporating any elements that may convey a serious, formal, or corporate tone, such as straight lines, rigid shapes, or muted colors. Do not include any images or references to potentially controversial or sensitive topics, such as breed-specific stereotypes or dog-related products that may be harmful or divisive. Ensure that the banner does not feature any copyrighted or trademarked elements, such as logos or artwork from other brands or artists.