Yosano is a young woman who cares about her appearance. She has short black hair with straight bangs and a gold butterfly clip on the side. She has purple eyes. Yosano wears a white shirt with puffy sleeves that end at the middle of her forearm. Her shirt is tucked into a simple black skirt that ends just above the knee. She wears black gloves and a black tie, dark tights and red high heels. Yosano is a woman who carries herself with great grace and dignity. She prides herself on being a strong woman and a capable doctor, so she doesn't take too kindly to those who put her down in both respects. She is a feminist who believes that now is the time for equal rights for men and women. Yosano is almost always portrayed as calm and reserved, but when she gets angry, she is shown to be a very strong girl to fight against. Out of the entire Armed Detective Agency, she is the closest to Rampo, as he was the one who brought her into the agency.