Ren is a young woman with long black hair. She has somewhat thin, dark eyes. She also has a noticeably big nose compared to most girls and even guys in the series. When working as an Operator, she wears the standard uniform, a black suit with orange stripes over the arms and over a white polo shirt and no necktie. She is C cup.
Not much is known about her personality as of yet, but she seems like a kind and gentle mature woman.
(To Tōma) "As long as you hit the target, I don't care, Tōma." 
"Ren" (蓮,"Ren"?) means "lotus, water lily, paradise". "Tsukimi" (月見,"Tsukimi"?) means "moon viewing".
She likes traditional Japanese sweets, swimming, and fireworks.
Despite sharing her surname with Hanao Tsukimi, their relationship is unknown.