Harold "Happy" Hogan is a long-time friend of entrepenuer Tony Stark. Stark employed him as his personal bodyguard and chauffeur.
Happy accompanied Stark in his supposed ceremony at Caesar's Palace but they ended up gambling. He then tries to sway reporter Christine Everhart from interviewing Tony but lets do the interview when Stark asks if she's cute.
When Stark was kidnapped, Happy tried everything he could to try and find Tony. Along with Pepper, they welcome their boss back from captivity, Happy even had small tears coming from his eyes to which Stark jokes him at it.