Kiri Minase

The protagonist of the story, Kiri is a 14 year old girl known as a "prince" due to her masculine looks she inherited from her fashion-model father. With high eyes, broad shoulders, an inability to grow out her hair, and her 5'9" height, Kiri makes a declaration at the age of four to become a prettier princess than Tohya, so that one day she can marry him. She has never confessed her feelings about Tohya to him, because of her insecurities about her looks that are keeping her from doing so. Kiri enters the world of fashion modeling secretly as a boy under the pseudonym, Tatsuki, to watch over and protect Tohya from people who would want to take advantage or hurt him. Most of Kiri's admirers are girls, which just complicate matters more. Source: Wikipedia