Paul is a an employee working on Mythic Quest. He started working on Mythic Quest as an intern, alerting to Poppy a glitch in the game.
His large physical presence directly outside Ian's office, as well as the standing desk which emphasised his stature, were both things that Pop arranged in order to annoy Ian. She was successful in this ambition, as Paul continued to reveal more and more things about himself that proved he was probably more impressive than Ian.
He easily thwarted Ian's claim to speak Spanish by being fluent enough to read classic Spanish literature. His standing desk proved medically necessary due to an injury he later revealed to Ian and Jo which had been sustained in combat. Using expertise gained during his long recovery from his military-related injury, he even helped Ian with a back injury that the MQ creator claimed to have.
Eventually, Paul's obvious superiority became too much for the insecure Ian, who gave Paul a "promotion" by banishing the combat veteran to the basement at MQ Studios.