Real Name: Kryppen
Occupation: Criminal
Marital Status: Single
Base of Operations: Gotham
Height: N/A
Weight: N/A
Eyes: N/A
Hair: N/A
First Appearance: Underworld Unleashed: Batman - Devil's Asylum (1996)
Created By: N/A

The man named Kryppen a.k.a. the Poisoner is a madman in Arkham Asylum who used to poison all of his victims.