Shadow

Shadow is a type of humanoid Abyss with the ability to mimic humans.

Appearance
A Shadow has the appearance of the person it is mimicking at the time. When it dies, it rolls up and spews blue froth from its mouth, then becomes enveloped in light and decays into ash.

Dating Arc
One Shadow is used by the Dragon Marauders division commander Vine Hachettes in his infiltration of the New Kingdom Atismata. He leaves behind the Shadow, disguised as himself, as bait while he escapes. The Shadow is mistaken for the real Vine by Lux Arcadia and Coral Esther. The two of them attack and kill it, realising their mistake.

Abilities
The signature ability of a Shadow is mimicking the appearance of humans. Their mimicry is good enough that people who are familiar with the real person's appearance can mistake them for the real thing. The detection abilities of Drakes can see through their disguise.

In exchange for their mimicry ability, Shadows are relatively weak compared to other Abyss. They can be killed even by people not wearing Drag-Rides. They do possess some degree of superhuman resilience, being capable of fighting even after injuries as severe as a severed arm.