She was an old rākṣasī or demoness appointed by Rāvaṇa as the leader of the demonesses who were guarding Sītā in the Aśokavana (grove) in Laṅkā. When she found the rākṣasīs harassing Sītā, she advised them to desist from doing so since she had had a prophetic dream in which she had seen Rāma killing Rāvaṇa in a battle (vide Rāmāyaṇa, Sundarakāṇḍa, sarga 27).

Trijaṭa is the name of an old brāhmaṇa who approached Śrī Rāma before his banishment, for wealth, and got it (Ayodhyākāṇḍa 32).