In 2015, Polii opened the season as a quarter-finalist in the Malaysia Masters partnered with Nitya Krishinda Maheswari. She and her partner were also eliminated in the quarter-finals of All England, Malaysia, and Australia Open. In May, she was part of the Indonesia team that won the bronze medal of Sudirman Cup in Dongguan, China. In June, she and Maheswari made it to the final of the Indonesia Open, but they were not able to win the title after losing to Tian Qing and Tang Jinhua in the final. Polii and Maheswari managed to retain their title in the Chinese Taipei Open after beating world number one Misaki Matsutomo and Ayaka Takahashi in the semi-finals, and the second seeded world number 3 Luo Ying and Luo Yu in the final.