A rakshasa. Khara and Atikaya were incarnations of Madhukaidabhas. (See Kaidabha and Atikaya) To Brahma was born Vishravas and to him Kuber, who lruled Lanka. Vishravas was alone and once looked at Kuber in anger. Kuber understood the reason and in order to placate his father, Kuber appointed three maids to serve him – Raka, Malini and Pushpolkada. Vishrawas sired Ravana and Kumbhakarna from Pushpolkada, Vibhishana with Malini and Khara and Shurpanakha with Raka according to Mahabharata Vanaparva Chapter 275 verses 1-8.
Khara subsequently became a famous rakshasa warrior. When Ravana, Vibhishana and Kumbhakarna meditated for boons, they were looked after by Khara and Shurpanakha, as per Mahabharata Vanaparva Chapter 275. Khara had two brothers named Dushana, Trishiras as per Uttararamayana. When Rama, Lakshmana and Sita were staying in their hermitage in Dandakaranya, Shurpanakha arrived there one day and tried to make Rama and then, Lakshmana her husband. Lakshmana hacked her nose and ears and she went crying back to Khara, Dushana and Trishiras. They battled Rama and Lakshmana with 14000 soldiers. They were all killed by Rama and Lakshmana as per Ramayana Aranyakanda Sargas 19-30.