Okada Sayana (岡田沙耶奈), known by her nickname Sayanyan (さやにゃん) during her time in TNX, is a former member of NICE GIRL Project! as a NICE GIRL Project! Kenshuusei. On April 30, 2011, she was officially unveiled as a new NICE GIRL Project! Kenshuusei during THE Possible Live 2011 Haru Love is here ~Kibou no Hikari~ at Shinjuku BLAZE. On September 25, 2011, she posted her final blog post on the NICE GIRL Project! Kenshuusei official blog and left the program afterwards.
After leaving NICE GIRL Project!, she began working as a model under the stage name Matsumoto Sayana (松本さやな). On January 29, 2013, she had her debut photoshoot with the modeling agency Miracle House, and then modeled with the modeling agency Charats-ps later that same year. She was also an aspiring actress, and became a member of the short-lived idol group Cute★Bits in 2013.