In Cursed Season 1 Episode 7, Nimue, Kaze, and Morgana fled to haunted caves to escape the Red Paladins, and in Cursed Season 1 Episode 8, Nimue helped the Fey take back Gramaire.
To give the Fey with them time to escape, Arthur and Gawain would charge the Paladins.
With what Nimue had done to help the Fey escape and after a rousing speech, she became the Fey Queen.
Nimue, Kaze, and Morgana couldn’t circle back with the Red Paladins on their tail.