Tsukai (ise zumi)

Togashi Tsukai was an ise zumi of the Dragon Clan. Mental instability and an opium addiction ruined his life, reducing him to poverty. He became an outcast by the name Tsukai, and moved to the village of Mimura. Alongside with Shozen they manufactured opium which was later sold in village's opium den.

Beverage
They brewed a strong beverage they called Pennaggolan. The poison was made from the root of a local plant, tane, which they found in the Forest of Reflection. During the nightmarish illusion it provoked, the victim was open to suggestion, and could be convinced to do almost anything.