Rimar Callista began her career as a singer in 2015 when she participated in the talent search competition Starvoices Indonesia and finished third. A year later, Rimar participated in another reality show, The Voice Indonesia, but only reached the knockout round. The peak of her career was when she joined Indonesia Idol in the eleventh season in 2020 and emerged as the champion. A graduate of Universitas Trisakti majoring in Petroleum Engineering in 2020, she then released her debut single titled “Waktu dan Perhatian,” composed by Andmesh.