Mider is the dark fairy of the Sleeves. He is bent on becoming the king of Tir-Na-Nog. It was Mider who provided Queen Meave the magical ram-head staff and later the powerful rune stone for it. In return, he asked for her help in gaining the throne of Tir-Na-Nog from Fin Varra. Mider himself has a variety of strong and dark magical powers.