Nishihara Reina is a participant in the Liar Game Tournament. She was No. 14 in the second round.

Nishihara appears younger than the majority of the Liar Game contestants, most likely due to her wearing her black hair in bunches. She has a bright and cheerful personality, which is complementary to her youthful appearance. Despite being bubbly she also seems rather gullible, having fallen for scams not once but twice.