Reiju is a slim young woman with shoulder-length light pink hair that covers her right eye and curls upward at the tips. Her purple eyes and occasional light pink lipstick add to her striking appearance. She sports the distinctive Vinsmoke curly eyebrows that swirl symmetrically in opposing directions, and both thighs are tattooed with the number '6' of Germa 66. Despite her cool and callous demeanor, a product of her father's stern militarism, Reiju possesses a hidden kindness and empathy. She often masks her compassion to avoid her family's cruelty, but it surfaces when she deems it safe, especially toward her brother Sanji.