William: Very controlling, obsession/worship/jealousy/hatred towards his best friend, responsible for various murders, an asshole by all metrics
Henry: Widely regarded as being the best at his job, passivity towards William's actions, should have done something before shit hit the fan, did not until too late, was personally affected by William
Jimmy: Very controlling, obsession/worship/jelausy/hatred towards his best friend, responsible for various murders and assault, an asshole by all metrics
Curly: Widely regarded as being the best at his job, passivity towards Jimmy's actions, should have done something before shit hit the fan, did not and then couldn't help anyone afterwards, was personally affected by Jimmy
Pony express and Fazbear Entertainment: Cartoonishly evil capitalist corporations, willing to endanger employees to make a profit, their actions are not the main source of horror but a backdrop that helps no one and makes things worse.