He is one of the three main protagonists on the show along with Ricky and Bubbles, portrayed by John Paul Tremblay, he was created by series creator Mike Clattenburg.

Julian is very clever and almost always finds a creative solution to the various problems the Boys encounter, though he lacks Ricky's talent for lying to the police.

Although he often appears intimidating to other characters, Julian is actually very compassionate to those he cares about and prefers to avoid confrontations, though he will not hesitate to fight back when things turn violent.

As the series progresses, Julian's character becomes more manipulative in order to achieve his profitable schemes, sometimes resulting in his malicious behavior directly affecting Bubbles or Ricky and creating conflict.

As a running joke, he almost always has a glass of rum and Coke in hand, regardless of the situation, including a scene in Season 2's seventh episode in which he emerges from a crashed – and rolled – vehicle with his drink still in hand, and in the film Trailer Park Boys: Countdown to Liquor Day, where he continues carrying it even when impersonating a security guard for an armoured car.

"[3] In 2005, John Paul Tremblay in character as Julian, along with Mike Smith and Robb Wells as Bubbles and Ricky, threw out the first pitch at the home opener of the 2005 Toronto Blue Jays season at the Rogers Centre.