Knight of the Moonlight (Rokosu)
A mysterious knight appears on Chapter 185 reveal himself as "Rokosu" (Moonlight) He joined Griffith Shortly after a brief introduction of himself..
 

Night Devil
Another Mysterious character appears on Chapter 186. He's able to fight with Tapasa people with ease. He confronts Griffith and says, "You are breathtakingly beautiful.....I’ll cut your head off someday and it will become mine". His role is still quite..a mystery.
 

Dragon Knight?
Another Mysterious knight who joins Griffith as one of his new knights. He's heavily armored in a suite that resembles a dragon. His power seem also second to no one.