Create an illustration of a young girl with porcelain-like skin and a stoic expression, holding a fluffy white cat. The girl has straight chestnut brown hair cut in a blunt bob style that frames her face. She wears a simple, pale pink blouse with a round neckline. A delicate butterfly with detailed wings rests gently on her hair. The background is a soft, textured beige, giving the impression of a vintage portrait. Pink cherry blossom petals float gently around them. The overall mood is serene and whimsical, with a touch of melancholy in the girl's eyes.