Aki Adagaki is a central character in the anime series 'Masamune-kun no Revenge.' Known for her beauty and wealth, Aki is a high school student with a sharp tongue and a reputation as the 'Cruel Princess' due to her harsh treatment of boys who confess their love to her. Despite her cold exterior, Aki hides a sensitive side stemming from past experiences. Her primary role in the series involves a complicated relationship with Masamune Makabe, a boy seeking revenge for her rejection during childhood, which leads to unexpected developments.