Keyes

Keith (キース Kīsu) is a Mage of the Dark Guild Tartarus and a member of the Nine Demon Gates.

Appearance
Keith, as his alias "Black Priest" suggests, dresses in form-fitting robes with a high collar. The robe itself has a checkered pattern, and covers a collared shirt and tie that Keith wears beneath. Around his face and on his head, Keith wears an ornate head piece, this covering his jaw and fanning out over his head almost like a crown.

Most notably though, Keith does not have a human face. Instead, his body seems to be that of a skeleton, with Keith possessing no nose, eyes or skin.

Tartarus arc
Keith gathers with his fellow Nine Demon Gates members at the Tartarus headquarters. As they convene, the group are joined by Kyouka and Silver, both of whom were off on "special missions". Hearing that two of their other members, Jackal and Tempesta, are also out, the group move to put their plans against the Magic world into action.

After hearing about Jackal's successful mission involving the destruction of the entire Magic Council, Keith listens as some of the other Nine Demon Gates members argue over their lack of participation in the plan so far, though he chooses to remain out of the conversation, instead silently commenting about their dedication to Zeref.

Equipment
Khakkhara: Keith carries around a Khakkhara, though not much is known about its capabilities.