Tadpole looks like the animal tadpole but in the Underworld, they are used to communicate. The ones who seem to use them are the Legislator, Executive and presumably Justice.

Different Tadpoles

Rippō (The Legislator)

Gyōsei (The Executive)

Shihō (The Justice)

No picture of the tadpole yet since it hasn't been seen in the manga yet.

Community content is available under CC-BY-SA unless otherwise noted.