He is a Type of Supreme Dalek who was in command in the the dalek invasion of earth 2009 he was above Davros and Dalek Caan.
History
this Supreme Dalek was in charge of the invasion he kept looking out for the Doctor he sent out a group of Daleks to kill Harriet Jones. then when the doctor arrived he sent out Daleks to try and find him and exterminate Torchwood. the doctor, Rose Tyler, Donna Noble and Jack Harkness was teleported to the crucible where the confronted the supreme one then the Daleks tried to destroy the TARDIS thinking they succeeded Jack Harkness shot him but it did no damage the supreme one killed him but did not know he was immortal. later on the supreme dalek watched the transmission from the doctors companions and friends. he fort that Davros betrayed the Daleks but it was actually Dalek Caan so he shot the machine the doctor was using to save the world destroying it the Jack Harkness Killed Him by blasting him with his Defabricator saying fill This.
