mother: Ketumati,sister: Kaikesi
In the Hindu epic the Ramayana, Prahasta (Sanskrit: प्रहस्त, IAST: prahasta, lit. he who has extended hands) was a powerful rakshasa warrior, chief commander of Ravana's army of Lanka. In his next birth Prahastha was reborn as Purochana in the Mahabharata as Duryodhana's trusted aide and who was responsible for the Lakshagraha incident.
Prahastha leads Ravana's army in the wars against Yama, Kubera and the Devas, and the Asuras and Daityas, through which Ravana establishes his sovereignty over the three worlds. He also leads the initial Lankan response to the invasion led by Rama, Lakshmana, Sugriva and the Vanara army.
Prahastha killed several important warriors of Sugriva's army and was actually proving to be a real threat to the army of Rama, so Lakshmana had to move in to the rescue of the beleaguered army, which was suffering at the hands of Prahastha (quoted directly from the Tulasidas Ramayana). As per Valmiki Ramayana, Prahastha was killed by Nila, a monkey warrior. Nila hurled a rock at Prahastha that broke his neck and killed him. (Valmiki Ramayana, book 6, canto 58, verses 53,54)