Harry

Harry was an employee at the Black Mesa Research Facility who befriended a security guard named Bernard Calhoun during the Black Mesa Incident. He perished during the incident in an elevator accident, although was resurrected years later by his former colleagues during the Combine occupation.

Biography
When security guard Bernard Calhoun attempted to escape through the Black Mesa Inbound during the incident, he crossed paths with Harry who warned him about the military's intrusion. Bernard allowed him to tag along and escape, although they got lost. They met two scientists named Alfred and Luther, with the former claiming that they knew the way out. They went into an elevator but unfortunately for Harry, he glitched and got stuck between the doors and was crushed to death when they closed on him. Bernard was overcome with grief despite only knowing him a short while and attempted to wake him up but to no avail. When Alfred and Luther were not present Bernard dismembered Harry's body as a "tribute". However this act kicked off a chain reaction of events in which Luther and Alfred believed that Bernard had killed Harry on purpose, as Luther witnessed Bernard destroying the body.

Before Black Mesa's destruction Luther, Alfred and their boss Smithers managed to get their hands on Harry's remains and took it away with them. Years later during the Combine's occupation, the scientists had managed to recreate Harry and kept him suspended in a tube of liquid, and awaited the right time to bring him back. They lured Bernard to the lab and captured him, where they unveiled what they had done with Harry and revealed he was important to stopping the Combine and their master Gordon Fiendman. After the three scientists were killed by Bernard's girlfriend Caitlyn, a rescued Bernard prepared to properly resurrect Harry from the dead, feeling it was the right time for his return.

Trivia

 * He uses the "Slick" model from Half-Life. He keeps this model even after crossing into the Source Engine world.