|Villain Type:||Former Ruler of Temra|
|Show:||Mystic Knights of Tir Na Nog|
|Homeworld:||Tir Na Nog|
|Number of Episode|
Full list of appearances
Nemain is the former ruler of Temra until her student Maeve took it over by force. She even wrought about the mutations upon Lugad when Maeve came to bring him to Temra. Since then, she plotted to overthrow Maeve & now & then aided the Mystic Knights in the disguise of an old man. When Maeve is defeated, she reveals her true form stating that the Silver Chalice is now hers & that her revenge on Maeve is complete. At the end of the episode, she makes an alliance with Mider which ended the series in a cliffhanger. When Mider gives her the offer to help take over Tir Na Nog & Kells, she tells Mider that she will think about it.
- Her name is a homage to the fairy spirit of the frenzied havoc of war in Irish mythology.