- "Consider your origins. You were not made to live as brutes, but to follow virtue and knowledge."
- —Ernest quoting Dante Alighieri[src]
Ernest was a Serbian assassin and one of the many hitmen and killers hunting down John Wick after the latter's assassination contract.
John Wick: Chapter 3 - Parabellum
After The High Table doubles the open contact on John Wick, John heads to a New York City library to collect several helpful items he'd stashed there at some point previously. After this, Ernest appears, approaching John while quoting from a library book. John tells Ernest that he still has time before the contract goes live, but Ernest says it's almost up, and that nobody would know the difference. John sternly asks Ernest if he's sure this is what he wants to do. Ernest confirms so, wishing to claim the large $14 million bounty for killing John. John taunts 'not if you can't spend it', and the two begin to fight.
Ernest begins to attack John with a knife, but John blocks the attack with the book he was holding, and then allows himself to be stabbed in the suit fabric on his right shoulder. John then disarms Ernest, keeping the book in his hands, and a fight ensues.
Ernest's towering height and physical endurance give him an edge against John at first. After being thrown around, John manages to land repeated strikes on Ernest with his book, brutally beating and slamming it into the man's mouth.
Having stunned Ernest, John moves him to a nearby table, places Ernest's head on top of the book, and kills him by breaking his neck on the edge of it. Ernest is left dead on the floor of the library, the entire fight had lasted barely a minute. John returns the book to its shelf and leaves.
- According to director Chad Stahelski, Ernest is inspired by the famous James Bond henchman Jaws from The Spy Who Loved Me and Moonraker.