Shurpanakha (Sanskrit: , IAST: surpanakha, lit. she whose fingernails are like winnowing fans) is a character in Valmiki's epic, the Ramayana, and is the sister of the main antagonist, Ravana, King of Lanka. She is known as Soorpanagai in Tamil, Sarpakanaka in Indonesian, Surpanakhar in Khmer, Surapandaki in Malay, and Sammanakkha in Thai.

Answer this question based on the passage: what is the name of ravan's sister? Okie... think carefully first, then make a decision:
This is the relevant information: Shurpanakha (Sanskrit: , IAST: surpanakha, lit. she whose fingernails are like winnowing fans) is a character in Valmiki's epic, the Ramayana, and is the sister of the main antagonist, Ravana, King of Lanka. So, the answer is Shurpanakha ( Sanskrit : , IAST : surpanakha , lit . she whose fingernails are like winnowing fans ).