To capture the unique character specific look use following in prompt :-

• For hair and general apperance - Stephanie has her iconic, vibrant pink bob haircut with perfectly straight edges and blunt bangs cut evenly across her forehead. The hair is smooth, glossy, and vividly saturated, giving it a bold, stylized appearance. She wears her signature wide pink headband, which sits neatly across the top of her head and keeps her hair in place

• For general ambience of the show and character - Stephanie from Lazytown