Swasti Sabdastantri, or Chua is bassist of the famous Indonesian rock band, Kotak.
Chua already familiar with and interested in music since she was in junior high school in Makassar. She got the influence from her brother who had already been plunged as a musician. Chua had moved to Surabaya and appeared on local television and several cafes.
Chua became bassist of Kotak, after replacing Prinzes 'Icez' Amanda (T.R.I.A.D).

Chua captivate the manager of a band called V-Mail (one of whose personnel are Mitha The Virgin) while she was performing with a band in college. Chua had joined with Kotak after management asked her to join the Kotak's second album.