Mana Kana (茉奈佳奈) is a Japanese pop duo formed by twin sisters Mikura Mana and Mikura Kana, born February 23rd, 1986 in Osaka. Mana and Kana first debuted as child actresses in 1995. In 1997, the Mikura twins formed pop group ManaKana (マナカナ - written in Katakana) and made their major debut with the single Nisenichiya no Mew.
みるくくるみ (mirukukurumi) is a female singer from Sapporo, Japan, who has been active since 2000. She is member of Angel Note. In 2006, she changed her name to Riryka and has since then released music under that name.