Rumi is the protagonist of the Sony Animation film KPop Demon Hunters, the leader and lead vocalist of the K-pop group HUNTR/X, and a secret half-demon who wields a "saingeom" sword to fight demons. She is portrayed as confident and ambitious but also hardworking, with a caring and empathetic nature. Underneath her K-pop idol persona, she struggles with her dual identity, fearing her secret will be exposed while harboring a deep desire to protect her fans and world from supernatural threats. 