Who sits with the King in His Throne?

Who sits with the King in His Throne?
Not a slave but a Bride,
With this King of all Greatness and Grace
Who reigns not alone;
His Glory her glory, where glorious she glows at His side
Who sits with the King in His Throne.

She came from dim uttermost depths which no Angel hath known,
Leviathan’s whirlpool and Dragon’s dominion worldwide,
From the frost or the fire to Paradisiacal zone.
Lo, she is fair as a dove, silvery, golden, dove-eyed:
Lo, Dragon laments and Death laments, for their prey is flown:
She dwells in the Vision of Peace, and her peace shall abide
Who sits with the King in His Throne.