Create a highly realistic portrait of a young woman with a short bob hairstyle and slightly wavy, soft black hair. She should have a natural, fresh look with subtle makeup that enhances her delicate features. Her face should be slender, with a distinct oval shape, giving her a refined and elegant appearance. Her eyes are large and expressive, with a gentle warmth in her gaze. She is wearing a cozy green sweater that contrasts nicely with her skin tone. The woman's expression should be a blend of cheerfulness and kindness, capturing a slight smile that exudes warmth and friendliness. The background should be soft and blurred, ensuring the focus remains on her face and expression, with even, soft lighting that highlights her natural beauty.