Vibhishana

After performing a penance to invoke a boon from Brahma, he asked the deity to always set his mind on the path to righteousness, and nothing more.

His mother, Kaikesi, advised him to go and serve Rama, who was at that time assembling an army to defeat Ravana and to recover his wife.

In some versions of the epic, he takes his slain brother's queen Mandodari as his second wife, though in others he merely seeks her blessings during his coronation.

When Rama was about to leave Ayodhya at the end of his reign, he assumed his true form of Vishnu, ordering Vibhishana to stay on earth and serve the people and guide them to the path of truth and dharma.

[13] Vibhishana is featured in the regional legend of the Ranganathaswamy temple of Srirangam, considered the foremost of the Divya Desams, the abodes of Vishnu in Sri Vaishnavism.

[16] In some period of history Sinhalese people have considered Vibhishana as one of the Sathara Waram Deviyo (four guardian deities).

[18] In the 15th-century poem of Thotagamuwe Sri Rahula Thera, the sælalihini sandesaya, Myna is ordered to carry the missive to Vibhishana at his temple in Kelaniya.

aśvatthāmā balirvyāsō hanumāṁśca vibhīṣaṇaḥ।kṛpaḥ paraśurāmaśca saptaitai cirañjīvinaḥ॥saptaitān saṁsmarēnnityaṁ mārkaṇḍēyamathāṣṭamam।jīvēdvarṣaśataṁ sopi sarvavyādhivivarjitaḥ॥The mantra states that the remembrance of the eight immortals (Ashwatthama, Mahabali, Vyasa, Hanuman, Vibhishana, Kripa, Parashurama, and Markandeya) offers one freedom from ailments and longevity.

Vibhishana (left) shows the Pushpaka Vimana to Rama and Lakshmana
Rama and Sita worship Shiva at Rameshwaram as Vibhishana (right) looks on with Lakshmana, Tumburu and Narada
Vibhishana clarifies Rama about the enemy troops