The Rajmala, the royal chronicle of Tripura, describes Ratna as the first of the kingdoms rulers to assume the title of Manikya, with historians initially placing his reign in the latter half of the thirteenth century.

[7][6] Traditional accounts state that Ratna was the youngest of the eighteen sons of his father, who is named as Dangar Fa (presumably Dharma Manikya).

The King supposedly had a table set for dinner for the princes, but just as they were about to start eating, thirty hungry dogs were released into the room, despoiling their food.

[1] The Rajmala continues that Ratna later revisited Bengal and in gratitude for the Sultan's help, he presented to him an elaborately caparisoned elephant and a ruby (manikya) as gifts.

[10][note 2] Upon his ascension to the throne, Ratna began an extensive administrative reform of his new kingdom, modelling the changes on his observations of the government of Bengal.

This Bengali influence was further felt in the currency, with Ratna being the first monarch to mint coins, mimicking the weight and fabric of those struck by the Sultans of Bengal, whilst also providing evidence of the religious conditions at the time.

[20][21] Though the Rajmala references Ratna's devotion to the Hindu deities Vishnu and Narayana, this numismatic evidence also alludes to his worship of Shiva and Parvati through the titles and legends he employed.

All of this indicates that Ratna patronised all sects equally and, alongside records of his charitable deeds (Dāna), show his attempt to adhere to the ideal of a Hindu ruler as advised in the Puranas and Smriti.

Though his rule had laid a stable foundation for his dynasty, his death precipitated a period of confusion and anarchy, with army leaders gaining considerable influence.