広瀬彩海 (Hirose Ayaka); birth name: 廣瀬彩海, is a former Japanese idol under Hello! Project as a member and the leader of Kobushi Factory. She was first introduced as a Hello Pro Kenshuusei member on November 29, 2014 at the Hello Pro Kenshuusei Happyoukai 2014 ~11gatsu・12gatsu no Nama Tamago Show!~. Prior to joining Hello Pro Kenshuusei, she was a member of NICE GIRL Project! Kenshuusei. On March 30, 2020, Kobushi Factory disbanded, and Hirose Ayaka graduated from Hello! Project. Soon after, she left UP-FRONT PROMOTION. As of late 2020, she has been working freelance as a talent and musical actress.