|Place of birth:||Germany|
|Place of death:||Argentina|
P. Eckstein is a Nazi Officer and a Major of the Gegengeist Gruppe. He worked closely with The Butcheress (though he did not seem to like her) and experimented with the toxic gas, using the natives as test-subjects. Eckstein tried to eliminate Rayne with the toxic gas, but Rayne kills him using his own trick; by kicking and breaking the protective glass to his room, allowing the gas to leak in. Shortly after, Rayne knocks on the door of the roof. The Butchress sees Eckstien in the peephole, but as it turns out, Rayne severed Eckstein's head and held it up, so the Butcheress opens the door and Rayne attacks.
|Dr. Báthory Mengele · Beliar · Collaborators · D. Mauler · Daemites · Deputy · Diseased · Elite Soldiers · Feral Vampire · G. Gosler · Giant Bat · Gravedigger · Hedrox the Infinite · Jürgen Wulf · Kazi · Kommando · The Maraisreq · Marassa · Mutates · Mynce · P. Eckstein · Queen of the Underworld · Rayne · Sigmund and Simon Krieger · Von Blut · Enemies|
|Dariel Zerenski · Ephemera · Ferril · Foreman · Kagan · Kagan Elites · Kasumi · Kestrel · Lockdown · ManCow · Mora · Ninja · Other Dhampir · Rayne · Roach Queen · Severin · Shadow Legion · Slezz · Suicide Bombers · Prof. Trumain · Unraveler · Xerx Mephistopheles · Minions|
|Kagan · Rayne · White-Haired Man · Enemies|