Hirose Ayaka (広瀬彩海; Real Name 廣瀬彩海) is a member and leader of Kobushi Factory, a Hello Pro Kenshuusei unit under Hello! Project. She was first introduced as a member of Hello Pro Kenshuusei on November 29, 2014 at the November / December recital. Prior to joining Hello Pro Kenshuusei, she was a member of NICE GIRL Project! Kenshuusei.