Masamune-kun's Revenge: Aki Adagaki

 Aki Adagaki is a rich, beautiful girl who treats all boys like dirt. She has the talent of giving all boys who ask her out a unique and mocking nickname. She has no real sense of what to do outside, as shown as when she wore cosplay to a date. She is shown to rely on her maid heavily, although she does not treat her well. She is also shown to having a huge appetite, which causes her great embarrassment.