The Nine Nazgûls

Nine Nazgûls:
Riya
Yuka
Khamûl
Nazgûl
Helm Hammerhand
Tailon
Isildur
Suladân
The Witch King.

they all are cold, heartless, unhinged and ruthless murders, commanded by Sauron himself.

Theirs masks is the meaning of their origin, Helm wears a mask with two large horns on both top sides of his head, his weapon is a sharp hammer. Isildur wears a mask that covers all of his head, his weapon is a sword and Summon Gondorian Wights. Rya and Yukka wears the same mask, and they are known as "The Nazgûl Sisters" their weapon is a chained axe. Tailon doesn't have a mask, but there are differences, his skin is pale and drained of color, save for black veins surrounding his eyes. His eyes glow orange, and he wears a hood, his weapons are a bow, a sharp dagger, a sword, and a hammer. Suladân wears a mask with a rupee on the front of it, his weapon is a sword. Khamûl wears different, a helmet, that doesn't cover his face, there is no face in him, his weapon is two hammers. The Witch King has a ring on a finger. Wears a helmet-crown, the most obvious being the helmet only having a single cavity as opposed to having eye sockets and lower cavity, his weapon are powers, he can control, move destroy, smash, he can control minds, and more things with his black green power of the ring, he is the Lord of all of the nine. They all wear an gray armour and a dark cape.

They bow down to him, he is a very powerful being, the dark Lord himself, the one who created the rings and ruler of Mordor.