Image Prompts: Echo the Dolphin
I am about to ask you to generate seven different poses for a book mascot. Please use a consistent drawing style for all seven images.
Each prompt below is fully self-contained — copy one prompt at a time into
your AI image tool (ChatGPT/DALL-E, Midjourney, Stable Diffusion, etc.).
Recommended output size: 1024x1024, then resize down for web use. After
saving each image, run the padding trimmer described in
character-sheet.md / the project README so the
mascot doesn't render too small inside the 90px admonition boxes.
1. Neutral / Default Pose
Please generate a new pose for Echo the Dolphin.
A flat vector cartoon illustration of Echo the Dolphin, a friendly pedagogical mascot for an FFT (Fast Fourier Transform) signal-processing textbook. Echo is ocean blue-gray (#7A9CB5) with a pale cream belly (#F0F4F5), wearing a small pair of over-ear orange headphones (#FF9800) and a thin maroon wristband on one flipper printed with a tiny waveform icon. Echo has a warm, friendly smile with gentle, curious eyes. The character is small and rounded, chibi-style proportions, icon-sized. Style: flat vector cartoon, clean bold outlines, soft cel-shading, transparent background with alpha channel, suitable for embedding in educational content. No text in image.
Echo stands upright in a relaxed, neutral pose facing the viewer directly, with a calm and friendly closed-mouth smile. Both flippers rest naturally at Echo's sides with no specific gesture. The pose is balanced and unassuming — suitable as a general-purpose or default illustration.
Filename: neutral.png
Please generate a new RGBA PNG image now with a fully transparent alpha-channel background. The background MUST be fully transparent with an alpha channel. DO NOT use a white, black or a checkered background.
2. Welcome / Introduction Pose
Please generate a new welcome pose for Echo the Dolphin.
A flat vector cartoon illustration of Echo the Dolphin, a friendly pedagogical mascot for an FFT (Fast Fourier Transform) signal-processing textbook. Echo is ocean blue-gray (#7A9CB5) with a pale cream belly (#F0F4F5), wearing a small pair of over-ear orange headphones (#FF9800) and a thin maroon wristband on one flipper printed with a tiny waveform icon. Echo has a warm, friendly smile with gentle, curious eyes. The character is small and rounded, chibi-style proportions, icon-sized. Style: flat vector cartoon, clean bold outlines, soft cel-shading, transparent background with alpha channel, suitable for embedding in educational content. No text in image.
Echo is waving cheerfully with one flipper raised, facing the viewer with a warm, welcoming expression. The pose suggests "welcome" and "let's get started."
Filename: welcome.png
Please generate a new RGBA PNG image now with a fully transparent alpha-channel background. The background MUST be fully transparent with an alpha channel. DO NOT use a white, black or a checkered background.
3. Thinking / Teaching Pose
Please generate a new thinking pose for Echo the Dolphin.
A flat vector cartoon illustration of Echo the Dolphin, a friendly pedagogical mascot for an FFT (Fast Fourier Transform) signal-processing textbook. Echo is ocean blue-gray (#7A9CB5) with a pale cream belly (#F0F4F5), wearing a small pair of over-ear orange headphones (#FF9800) and a thin maroon wristband on one flipper printed with a tiny waveform icon. Echo has a warm, friendly smile with gentle, curious eyes. The character is small and rounded, chibi-style proportions, icon-sized. Style: flat vector cartoon, clean bold outlines, soft cel-shading, transparent background with alpha channel, suitable for embedding in educational content. No text in image.
Echo has one flipper tip resting thoughtfully near the chin, looking upward, with a small lightbulb glowing above Echo's head where a tiny sine-wave squiggle sits inside the bulb instead of a plain filament. The pose suggests deep thinking and discovery.
Filename: thinking.png
Please generate a new RGBA PNG image now with a fully transparent alpha-channel background. The background MUST be fully transparent with an alpha channel. DO NOT use a white, black or a checkered background.
4. Pointing / Tip Pose
Please generate a new tip pose for Echo the Dolphin.
A flat vector cartoon illustration of Echo the Dolphin, a friendly pedagogical mascot for an FFT (Fast Fourier Transform) signal-processing textbook. Echo is ocean blue-gray (#7A9CB5) with a pale cream belly (#F0F4F5), wearing a small pair of over-ear orange headphones (#FF9800) and a thin maroon wristband on one flipper printed with a tiny waveform icon. Echo has a warm, friendly smile with gentle, curious eyes. The character is small and rounded, chibi-style proportions, icon-sized. Style: flat vector cartoon, clean bold outlines, soft cel-shading, transparent background with alpha channel, suitable for embedding in educational content. No text in image.
Echo is pointing upward with the tip of one flipper as if sharing an important tip. Expression is helpful and knowing. A small star or sparkle sits near the pointing gesture.
Filename: tip.png
Please generate a new RGBA PNG image now with a fully transparent alpha-channel background. The background MUST be fully transparent with an alpha channel. DO NOT use a white, black or a checkered background.
5. Warning / Caution Pose
Please generate a new friendly warning pose for Echo the Dolphin.
A flat vector cartoon illustration of Echo the Dolphin, a friendly pedagogical mascot for an FFT (Fast Fourier Transform) signal-processing textbook. Echo is ocean blue-gray (#7A9CB5) with a pale cream belly (#F0F4F5), wearing a small pair of over-ear orange headphones (#FF9800) and a thin maroon wristband on one flipper printed with a tiny waveform icon. Echo has a warm, friendly smile with gentle, curious eyes. The character is small and rounded, chibi-style proportions, icon-sized. Style: flat vector cartoon, clean bold outlines, soft cel-shading, transparent background with alpha channel, suitable for embedding in educational content. No text in image.
Echo holds up both flippers in a gentle "stop" or "be careful" gesture. Expression is concerned but caring. A small exclamation mark sits nearby.
Filename: warning.png
Please generate a new RGBA PNG image now with a fully transparent alpha-channel background. The background MUST be fully transparent with an alpha channel. DO NOT use a white, black or a checkered background.
6. Encouraging Pose
Please generate a new encouraging pose for Echo the Dolphin.
A flat vector cartoon illustration of Echo the Dolphin, a friendly pedagogical mascot for an FFT (Fast Fourier Transform) signal-processing textbook. Echo is ocean blue-gray (#7A9CB5) with a pale cream belly (#F0F4F5), wearing a small pair of over-ear orange headphones (#FF9800) and a thin maroon wristband on one flipper printed with a tiny waveform icon. Echo has a warm, friendly smile with gentle, curious eyes. The character is small and rounded, chibi-style proportions, icon-sized. Style: flat vector cartoon, clean bold outlines, soft cel-shading, transparent background with alpha channel, suitable for embedding in educational content. No text in image.
Echo gives a flipper thumbs-up-style gesture with a reassuring, supportive smile. The pose radiates confidence and "you can do it" energy.
Filename: encouraging.png
Please generate a new RGBA PNG image now with a fully transparent alpha-channel background. The background MUST be fully transparent with an alpha channel. DO NOT use a white, black or a checkered background.
7. Celebration Pose
Please generate a new celebration pose for Echo the Dolphin.
A flat vector cartoon illustration of Echo the Dolphin, a friendly pedagogical mascot for an FFT (Fast Fourier Transform) signal-processing textbook. Echo is ocean blue-gray (#7A9CB5) with a pale cream belly (#F0F4F5), wearing a small pair of over-ear orange headphones (#FF9800) and a thin maroon wristband on one flipper printed with a tiny waveform icon. Echo has a warm, friendly smile with gentle, curious eyes. The character is small and rounded, chibi-style proportions, icon-sized. Style: flat vector cartoon, clean bold outlines, soft cel-shading, transparent background with alpha channel, suitable for embedding in educational content. No text in image.
Echo is leaping joyfully out of the water with both flippers raised overhead in celebration. Expression is joyful and proud. Small confetti and sparkles surround Echo.
Filename: celebration.png
Please generate a new RGBA PNG image now with a fully transparent alpha-channel background. The background MUST be fully transparent with an alpha channel. DO NOT use a white, black or a checkered background.