Harbinger (Japanese: 真魔 Shinma) are Overseer's Yo-kai minions. They first appeared in episode 37, where one appeared out of nowhere and attacked Summer and co.
Biology[]
Harbinger look somewhat like Overseer. They are grey snake-like creatures, with several arms, a yellow eye with a red iris, a black spiral surrounding the eye and a jagged-shaped mouth.
Abilities[]
They can fire blue energy beams from their mouths and can convert the end of their tail into a second mouth. They are capable of corrupting other Yo-kai as seen with what happened with Jibanyan and Hot Pot.