Killian Werner-O'Leary (O'Leary, Werner) - young irish-german fellow, victim of brain cancer, main character
Brian - O'Leary's best friend, bartender, genius, red-headed
Erin McCarthy - O'Leary's nurse and friend
Dr. Mario Schreiber - Doctor who helps revive O'Leary
Kurt Maihöfer - soldier O'Leary wakes up next to, continues with him to Auschwitz
Lagerführer - head of camp
Wojciechowski - polish doctor and professor
Rickenbach - high-ranking SS-Official
Nikolai Hart - O'Leary's friend in Auschwitz, soldier, father and husband
Dr. Ziegler - Doctor in Auschwitz who preforms medical experiments
Hans - Marie's Grandfather, a Nazi himself
Prof. Whittle - Marie's english teacher, fled Germany in early 1939
Michael 'Papa' - Marie's father, a WWI veteran
Kurt - Michael's friend, in love with Marie, creepy and sadistic
Sidorov - terribly thin russian scientist, translucent skin, Werner's lab partner
Mozorov - russian scientist, Sidorov's friend from Gulag, shallow knowlage of english
Bojarski - polish scientist, former colleauge of Wojciechowskis