A ruthless Nigerian inmate with a penchant for rape, murder and physical intimidation, Adebisi controlled much of the drug trade at one point and is among the most feared and powerful inmates in the prison. Throughout his time in Oz, Adebisi is seen to have both sociopathic and maniacal tendencies, showing little to no remorse for the various atrocities he had committed both in and out of prison. He is also shown to have a severe addiction to heroin, suffering a nervous breakdown due to withdrawals in season 2, for which he is subsequently thrown into the psych ward where his insanity is further explored through various psychotic episodes. Adebisi's character dies in season four, when he is murdered by Karim Saïd in self defence.