The (mostly) harmless, cheery
vent climbing balloon vendor of Freddy Fazbear's Pizzeria. Always ready to greet a customer, employee, animatronic or really anything with a friendly 'Hi!' and a balloon. They're not exactly supposed to be complimentary, but that doesn't keep him from handing them out to whomever.
Prone to bothering anyone on shift and stealthily borrowing batteries from the Security Staff's flashlights, he may be annoying but at least he doesn't want to murder you.
Balloon Boy is for the most part blissfully unaware of the reputation the Pizzaria and genuinely loves his job. He also strives to be on good terms with his co-workers, human or animatronic. Despite a good work ethic he gets distracted at times and has his own bouts of mischief and shennanigans.
His battery stealing habit has had him unwittingly seal the fate of more of the night staff than anyone has the heart to tell him.