Katherine (16 y.o) – the first victim (August 1990). Although the Wagners divided their responsibilities regarding the deal and murder was a Alice's job, Katherine's death was orchestrated by Lake. He attracted her attention using the Stewart animatronic, who controlled it and strangled her. Unlike everyone else, she was from a very poor family and entered the establishment through shady means, but she had to pay double the entrance fee.

Trisha (9 y.o.) is the second victim (also in August 1990) and the youngest. She and the other two girls were killed by Alice. Unlike Katherine, Trisha's "disappearance" caused a major scandal, which increased the time between missings.

Dorothy (12 y.o) is the third victim (October 1990). Her death was notable for being aggressive and refusing to yield to Alice, who beat her, inflicting numerous stab wounds, and then left her to die in one of the service rooms.

Linda (11 y.o.) is the fourth victim (December 1990). Alice slit Linda and Trisha's throat, as this was a relatively quick method of killing.

And... Alfred. All info about him here