Rena has a supporting role in グッモーエビアン! / Gummo Evian (G'mor Evian, which is 'Good Morning, Everyone')
Rena plays the best friend of Hatsuki,played by actress Ayaka Miyoshi (she is a former member of idol group 'Sakura Gakuin').
The film stars the very talented Kumiko Aso as Hatsuki's mom, and the likewise talented Yo Oizumi as the eccentric sometimes boyfriend of Hatsuki's mom. Other notables in the cast include Eiko Koike and Anna Tsuchiya.
Here is a clip: