Design an original friendly 3D mascot for a daily habit app, based on a small cloud. Give it one compact rounded body, a clear silhouette, simple expressive eyes and a small welcoming smile. Add one distinctive leaf-shaped tuft. Use warm white and mint green colors, soft matte clay-like material, subtle surface variation and broad diffuse studio lighting. Show one full-body character in a relaxed welcoming pose, centered with generous padding on a plain pale cream background. Make it recognizable at app-icon size. No resemblance to a named existing mascot, no text, logos, tiny decorations or watermark.