A Brother's Sorrow (adopted from @Eris345)

Chapter 9

William stepped into the new restaurant, Freddy Jr's, in a haze like he'd won the lottery.
There were kids running in every direction, greasy and hideous in his opinion. Their faces shared the same joy he wished to have seen just a glimpse more of in his children. They were nothing more than fodder at this point for the hungry society of weak-blooded people. Fodder that would be necessary to bring back his son as he did his daughter.
Mikey, I promised I'd put you back together.
A little girl darted past the depressed man, accidentally ramming into an old hag that William immediately assumed was her mother. He decided to eavesdrop on their conversation, as her appearance and personality would be perfect to crush and merge with the other kids he had...borrowed from their families. Pretending to be intrigued on the menu, he carefully tuned out the unimportant people and listened to the girl.
"Granny! Granny! I couldn't find Sissy by the Pirate's Cove! There was a pretty fox though!" the girl said, a bright smile still apparent on her small face.
The old woman gave her a weak grin, successfully masking her true emotions of crippling grief. "Uh yeah...did you check the arcade? S-she could've run in there..." She disappeared a while ago, but maybe...perhaps she could've run here and hid away. Yeah...that has to be it.
William, grinning from ear to ear, slipped into the backroom using his manager's keys. He peered as he identified the nostalgic, golden rabbit, its empty eyes beckoning the Afton to embrace his destiny. A wave of nostalgia struck the man, forcing him to his knees. Tentatively, he unwound the spring locks before delicately climbing into the suit. As soon as he finished buckling the rusty straps, he beamed and stepped into the hallway. He walked to the arcade, ready to sacrifice whatever he could to save his son.
Michael's soul, unlike the others, hadn't latched onto Fredbear. William had assumed that the robots that killed the people would be the object a soul would latch onto, but it seemed that he was wrong. Then again, Michael's body wasn't inside of Fredbear; it was inside a coffin buried 6 feet beneath the earth.
(10 minutes later)
The little girl skipped along happily, trying her best to locate her sister. Poking her head into the arcade doorway, she sniffed the air, catching a whiff of stale pizza despite the pizzeria only being a few days old. She walked over to an arcade machine and read the name which was painted on the side.
"Fruity Maze...so cool!" The little girl started to slip 4 Faztokens into the coin slot but stopped herself. "No, I need to find Susie. Mommy and Daddy said that she'd be here!"
William spotted the girl and stepped behind her, holding a knife. Leaning down, he grabbed the girl and threw her over his shoulder, using one matted paw to slap over her dainty mouth.
The little girl squirmed, trying her best to writhe her way out of the rabbit's grasp to no avail.
"You wanted to find your sister, right?" William asked, walking as quickly as he could with the threat of springlocks winding down ever present. "I know where she is."
The girl stopped struggling, now intrigued in what the bunny was saying. She couldn't speak, but her eyes sparkled in delight.
William smirked, grateful that the little brat had stopped wriggling. A bit longer, and he'd be dead. He opened the door to the safe room and threw her roughly inside.
The little girl crashed into a crate of spare parts, immediately losing consciousness upon impact,
The 3 other kids inside the room squealed in terror, huddling around the newcomer as the golden rabbit locked the door behind them.
William laughed, ripping the Springbonnie head off his own and shoving it onto the head of one of the boys.
Said boy screamed in agony as the springlocks snapped, plunging metal bits into his skull. He fell to the floor, extremely dead as blood began to pool upon the floor.
The others screamed, but sadly for them, they would never be heard ever again.
William fished a knife from his pocket and stabbed them all in the necks one by one. Blood sprayed onto the walls in a grotesque symphony. The children wailed a chorus of death as they collapsed one by one. Before long, the chorus had fallen silent and the walls and floor were spray painted a metallic red.
The murderer had already pinned the murders on one of the new employees, as his fingerprints were now on the knife used for slicing the toppings. The innocent chef would be framed and go to jail. But that wasn't William's concern. Not at all.
After all, soon he would bring Michael back. No matter the cost.