The Barber

The Barber (散髪宮 Sanpatsu Miya) was a troublemaker from Shinjuku.

Appearance
In the anime, the Poisoner is shown to be a young wear a gas mask and have slick white hair.

Personality
Based on the anime depiction it is inferred that the Barber had a fixation on collecting hair scalps of their victims.

Background
The Barber was a dangerous troublemaker who was based in Shinjuku. However it was reported that the Barber was among the troublemakers that were killed or in custody of the Materials Compiling Group No.3.

Trivia

 * In the anime, the police showed images of each individual troublemakers. Those who were captured were depicted behind bars. Others though such as the Barber were depicted with images possibly related to their deaths. For the Barber it was a snapshot of a hanging body wrapped in what appears to be hair, inferring that the troublemaker committed suicide.