[OSHI NO KO] Kana Arima「有あり馬ま かな, Arima Kana?」 is a major supporting character in the Oshi no Ko manga series. She is a prodigious child actress and a childhood acquaintance of Aqua and Ruby, though her popularity has waned by the time of the main story. She is also the former center of the revived idol group B-Komachi. Though talented, she eventually started getting fewer jobs due to being difficult to work with, causing her to develop severe self-esteem issues and even change her acting style to survive in the industry. However, after meeting Aqua and Ruby again and being recruited into B-Komachi as well as through her rivalry with fellow actress Akane Kurokawa, she steadily began to regain her former self-confidence and undo the shackles she placed on herself.