She is the daughter of Moon Moon Sen and Bharat Dev Varma and the granddaughter of actress Suchitra Sen.
Sen with her mother Moon Moon Sen
Her sister Riya Sen is also in the Bollywood industry. Their father Bharat Dev Varma is a member of the royal family of Tripura. Her paternal grandmother, Ila Devi, was the princess of Cooch Behar, whose younger sister Gayatri Devi was the Maharani of Jaipur. Her paternal great-grandmother Indira was the only daughter of Maharaja Sayajirao Gaekwad III of Baroda.
Raima’s maternal great-grandfather Adinath Sen was a prominent Kolkata businessman, whose son Dinanath Sen – a relative of former Union Law Minister Ashoke Kumar Sen- was the Diwan or a Minister of the Maharaja of Tripura. The sisters are credited on-screen under their mother’s maiden name, although their official papers carry the surname Dev Varma.