Nine Masked Beasts (Zeref)

The Nine Masked Beasts are entities created by Kamui through the use of the Black Nine-Tails' chakra. Five of these beasts are described as, while the other four are referred to as.
 * , the Azure Dragon, is a dragon that resembles a seahorse.
 * , the White Tiger, is a lean and slender tiger.
 * , the Vermilion Bird, is a bird with elegant and dramatic plumage.
 * , the Black Tortoise, is a tortoise with a shell made of overlapping plates.
 * , the Golden Snake, is a massive serpent with golden scales.
 * , the Celestial Maiden, is an angelic priestess with flowing robes.
 * , the Grim Reaper, is a priest that resembles a skeleton and carries a scythe.
 * , the Northern Sage, is a priest with a fox staff.
 * , the Southern Sage, the matching counterpart of Hokuto Sennin.

When defeated, they lose their disguises and revert back to their true forms, which are masked fox kits that each possess a single tail. They can also convert back into chakra that will arc through the air from their present location back to Kamui. Once they collide with Kamui, they form back into the Black Nine-Tails.