Walter purple

The lore of Five Nights at Freddy's (FNAF) is a complex, multi-decade tragedy primarily centered on the families of two business partners, William Afton and Henry Emily, whose path to success was derailed by serial murder and supernatural possession. 
The Origin: Afton and Emily
In the late 1970s and early 1980s, Henry Emily (a robotics genius) and William Afton (a businessman) co-founded Fredbear’s Family Diner. They revolutionized entertainment with "springlock suits"—animatronics that could also be worn by humans as costumes. 
The Inciting Tragedies
The franchise's horror stems from three key events involving Afton's and Emily's children:
The Murder of Charlotte Emily: Driven by jealousy or madness, William Afton murdered Henry's daughter, Charlotte, outside the diner. Her soul possessed the Security Puppet, which later helped other victims' souls inhabit animatronics to seek revenge.
The Bite of '83: William’s youngest son (often called the Crying Child) was terrified