ROS is moniker for Andhie Hajar Mahatmadi Putra. Starting his new "world” from Doubledeer Academy in 2018. With the help from Laze, Lecture of HipHop Artistry, Ros and Klakar (Batch 1 of HHA Doubledeer Academy) made an mixtape together within 2 months. 
 In mid-2020, ROS launched 'BETHESDA' EP. Lately, 'Masih Manusia' has been streamed for 49k+ and 'Dalam Bayangan' achieved 'Irama Kotak Suara' award from Pop Hari Ini in November 2020.