Rintrah is a character in William Blake's mythology

William Blake's mythology

The prophetic books of the English poet and artist William Blake contain a rich invented mythology , in which Blake worked to encode his revolutionary spiritual and political ideas into a prophecy for a new age. This desire to recreate the cosmos is the heart of his work and his psychology...

, representing the just wrath of the prophet. Rintrah first appears in The Marriage of Heaven and Hell

The Marriage of Heaven and Hell

The Marriage of Heaven and Hell is a book by the English poet and printmaker William Blake. It is a series of texts written in imitation of biblical prophecy but expressing Blake's own intensely personal Romantic and revolutionary beliefs. Like his other books, it was published as printed sheets...

: "Rintrah roars and shakes his fires in the burdened air" shows him personifying revolutionary wrath. He is later grouped together with other spirits of rebellion in The Vision of the Daughters of Albion.
Rintrah is the brother of Palamabron

Palamabron

Palamabron is a character in William Blake's mythology, representing pity.He is the brother of Rintrah , Bromion , and Theotormon , represented together as either the Sons of Los or of Jerusalem....

 (pity), Bromion

Bromion

Bromion is a character in the mythology of William Blake. According to S. Foster Damon he represents Reason, from the side of the poet's mind.-Incidence:* Visions of the Daughters of Albion, in which he plays a major role...

 (scientific thought), and Theotormon (desire/jealousy), represented together as either the Sons of Los

Los (Blake)

In the mythological writings of William Blake, Los is the fallen form of Urthona, one of the four Zoas. He is referred to as the "eternal prophet" and creates the visionary city of Golgonooza. Los is regularly described as a smith, beating with his hammer on a forge, which is metaphorically...

 or of Jerusalem.