okay I got this idea from @Wolfieandmollyforeva from their book of page 4 of Second chance  and  how it was explained of toy Chica's obsession with Goldie soo I decided to give some more of the story idea so relax and if you get disturbed easily then I may warn you to leave or read at your risks or heck even hold a stuffed animal you like very much be your reading buddy so now enjoy  ( P.S: this was the only picture I could find for toy Chica acting of a yandere)

how the obsession began:

toy Chica was in the kitchen getting ready to get the birthday cake for the birthday child, but as soon, as she got a little bit of a grip on the birthday cake ( not sure what kind of cake and how many layers there are so we will go with this one of how she dropped it also the came will be simple to fix up not too fancy but back to the story now)

as she was about to head out to give the cake to the birthday child but was still in the kitchen, she tripped over something and soon dropped the cake making a loud SPLAT sound, the toy chicken got up and looks at the cake now in ruins, she started to panic but didn't see Goldie was coming in being sneaky as usual and sees the birthday cake and a very panicking toy chicken, he slowly goes to her and puts his paw on her shoulder, the toy chicken looks up and sees Goldie

Goldie: hey toy Chica what happened?

he asked and toy Chica started bawling and blabbering about how it was an accident that she dropped the birthday cake for the birthday child, the golden bear listens as he throws away the cake that was ruined and started to make a new one with the toy Chica to replace it * time skip* soon the cake was good as new and Goldie got what he wanted from the kitchen and waved bye to the toy chicken, and for the first time since she had arrived with her friends to the pizzeria, she fell in love with Golden Freddy and still does ever since.

present-day:

toy Chica was in her room with photos of Goldie all over her wall, as she was smiling like a yandere would and she had hearts over the golden bear and had drawing which she made herself of how she saw her future with Goldie, not knowing that Goldie was gay for Bonnie, she stayed in her room, she planned on something special and soon got to the kitchen where it all happened and was smiling making some cupcakes for Goldie, since he hadn't been eating for a week or two, she hums as she makes and bakes the cupcakes, but to soon find out that Goldie had no interests in her, she finished the last finishing touches ( the cupcakes she made and yes they are purple)

the toy chicken hums to herself as she walks to Goldie's room, she opens the door without knocking and sees in shock Bonnie and Goldie kissing on the lips and cuddling ( in a loving way not a sexy way so get that out of your heads please and thank you U^U), the toy chicken felt her heart shatter to tiny pieces and left the cupcakes gently on a board table and left running to her room and cried there feeling how unfair it was that Goldie was meant to be with her, she cried and cried never once leaving her room, but soon after hours, she stopped and sniffled, and looked at the purple bunny on one of the posters next to Goldie's feeling betrayed and ripped the bunny poster in pieces and stomps on them before stopping and thinking and gave off a smile when she got an idea 

WARNING THIS PART WILL GET GORY AND SCARY SO LEAVE BEFORE IT'S TOO LATE OR READ AT YOUR RISKS don't say I didn't warn you

the toy chicken smiles and went to the kitchen and looks and soon found what she was looking for a knife ( this knife is about 12-inches and is very sharp), the toy chicken smiles as she puts the knife behind her back and waits for Bonnie to come out of Goldie's room, she planned of what she would do to the purple bunny and that was to kill him to have Goldie all to herself and repeated some words to herself

toy Chica: Goldie's mine and mine only~

the toy chicken said repeatedly, soon Bonnie was walking out of Goldie's room having his tie a bit messy ( they were tickling each other), this made toy Chica grow angry, she continued to wait and watched the purple bunny go somewhere away from everyone and out of hearing range

toy Chica's thoughts: perfect now to kill this little boyfriend stealing %$!#, he won't get away from taking Goldie from me, I won't let this slide

the toy chicken followed the purple bunny still with the knife behind her back and as she got close enough she stabbed Bonnie in the back causing the purple bunny to scream in pain, toy Chica jumps up and pinned him down covering his mouth to muffle the screams as she had also managed to get a cloth and some Rohypnol on the cloth and puts it around Bonnie's mouth and nose, the tall purple bunny struggles putting everything he got, but toy Chica had  a tight grip on him not letting go, soon Bonnie saw black and was unconscious, Toy Chica soon dragged the unconscious bunny to her room and tied him to a chair and smiles waited for Bonnie to wake up to have her fun killing him slowly and painfully * time skip* Bonnie started to wake up and sees he was tied up and in a room as he looks around but felt a sharp knife on his back once more and looks seeing a red-eye toy chicken smiling at him

toy Chica: oh good you're awake I have been waiting almost forever but now let's begin our fun for trying to steal my future boyfriend, bestie~ 

she said putting the 12-inch knife to the bunny's throat as it was dripping with oil, she started to stab him in the eyes repeatedly making Bonnie scream in pain, as no one was around to hear his screaming of pain and cry for help, everyone was doing their own things, this went on for hours, as toy Chica puts the knife to Bonnie's throat and slit it open making oil spill everywhere, but not knowing someone was watching and was in terror, as it was toy Freddy, he wanted to ask toy Chica for some help of making cupcakes but when he saw what his toy chicken  friend was doing, fear overcame him and all he could do was watch in terror watching his toy chicken friend repeatedly stabbing Bonnie, and soon watch him die and slow and painful death, he stepped back but tripped over something making a loud noise alerting toy Chica as he jumps up and runs the best his chubby legs could carry him, but felt a sharp pain in oneof his legs, as he looks and sees the 12-inch knife in one of his legs as he looks up and sees toy Chica close to him and she picked him up dragging him by his ear and puts him in her room, gagging and tying him up but places the knife next to him smiling, making the toy bear cry in fear as toy Chica puts her finger on his lips and used her own finger on her lips

toy Chica: ssshhhh sorry toy Freddy, but you won't get in the way of my plans of being with Goldie

she said as the toy chicken smiles and closed the door behind her and went to find Goldie, still having oil on her hands and a little bit on her face as her eyes were hearts and her smile was creepy, she walked to Goldie's room and found him asleep, she smiled and tip-toes in and dragged Goldie somewhere in the pizzeria and lays him on a floor mattress and chained him there and had somehow managed to get her hands on the collar to block Goldie's magic so he couldn't escape, she watched the golden bear sleep watching him, smiling

toy Chica's mind: he's so cute when he sleeps, don't worry my berry bear, no one will take you away from me, you and I will be together forever~

she giggled softly to herself as she continued to wait but got the cupcakes from Goldie's room as she waits some more * time skip* Goldie wakes up and finds he wasn't in his room and he was on a mattress, he tried to get up but heard something and looked at his leg seeing he was chained to something, he got up and tried to teleport away but found he couldn't but finds the collar on him, he looksaround but founds some cupcakes and eats them feeling hungry, soon hearing a giggle somewhere, looking up and around and sees toy Chica, thinking he was going to be saved by toy Chica from whoever kidnapped him, but he was wrong, he looked more closely as each step the toy chicken made, he saw and his face went from relief to horror seeing his toy chicken friend's face covered with a bit of oil but a lot of her hands and holding something in her hand was the key to the collar

Goldie: toy Chica? w-what happened to you? 

he asked stuttering, the toy chicken giggles as she got closer to him smiling

Toy Chica: hello Goldie, I see you're awake now yay ^^

she said as Goldie was confused but getting scared, as he tried to get up but felt his legs give out, looking down and sees his legs were dismantled as he freaks

toy Chica: oh sorry about your legs I had to get rid of them, we don't want you running away now

she said smiling more Goldie tried to back away from the toy chicken, but no matter what toy Chica kept coming closer and closer, till he was up against the wall, shaking with fear

toy Chica: aww don;t be afraid I won't hurt you, no one will

she said and kissed Goldie's cheek, which startled the golden bear to slap her by accident, the toy chicken looks at Goldie smiling some more as she had something behind her back as she grabbed his bowtie and forced something in his mouth in a blink of an eye

toy Chica:  I love you best. I always loved you best,and since you don't understand let me give you, my love for you not that stupid bunny

she said making Goldie more afraid, his body shaking like jello and tried to get her off of him but no mutter how much he struggled against her, she was somehow stronger then him, as tears roll down his face

toy Chica: aww don't cry Goldie, let me love you and keep you safe better off then that bunny and your brother, that never loved you~

she said trying to play a trick on his mind to make him love her and her alone, as Goldie felt something was off and wanted Bonnie to be there to hold, love him, and feeling safe but he felt that Bonnie wouldn't be around anymore as he kept trying but toy Chica points a 9-inch at his torso

toy Chica: stop struggling me, love or I will make sure your lower half is gone too~

she said as Goldie kept trying to ignoring her threat but toy Chica sigh and slapped Goldie on the face and stabbed his torso hard, making Goldie scream in pain but having it muffled by tpy Chica's hand 

toy Chica: I warned you but look what you made me do, I love you too much, but you made me do this to you love, but now you are mine and mine alone

she said as this went on for a year, Goldie being in God knows where he was at, as he was either bandaged or stabbed or slapped more by the days, wanting Bonnie or someone to find him, he felt hopeless, wanting to be free and out of this nightmare, he had lost a lot of weight not eating what toy Chica had given him, not trusting her anymore of who knows what she put in his food, as his prayer would soon be answered, back with the others, they have noticed in 5 months that Goldie and Bonnie, even toy Freddy were gone, they started to look for them along with toy Chica, putting on her best act, as for toy Freddy, he was still in toy Chica's room, having a full fears of Necrophobia, Nyctophobia, soon everyone started to check everyone's room, including toy Chica's, one of the animtronics had found toy Freddy in toy Chica's room, completely skinny, and looked tired and hadn't eaten anything along with being tied and gagged, the toy bear sees before passing out, everyone talked as Freddy was holding toy Freddy close to him in the workshop, as everyone noticed toy Chica was gone but also found Bonnie dead, brutally stabbed and tied to the toy chicken's room chair. everyone started to look for her and in hopes that Goldie wasn't dead either, meanwhile back with toy Chica and Goldie, Goldie was being focrely snuggled against toy Chica, but not struggling or fighting her just letting her, in fear of another punishment, soon the toy chicken brings Goldie's head by his chin and kissed him on the lips and kept doing this, until the door to whatever the room was that Goldie had been trapped in was open and who was it but Foxy, the toy chicken growls as she got up and grabbed the same knife she used to torture the poor golden bear, but the pirate fox didn't stand there and took action immentally causing him to fight toy Chica, but had easily won, and goes over to Goldie seeing his poor state he was in  picking him up but covering his body with a blanket, he had been using to sleep in, and got ther chain off of his paw and took him back to the others, not saying a word and leaving toy Chica behind as she was unconscious giving the two time to get back or a head start, soon Goldie sees the others but no Bonnie, hiding his face but everything went back for him and he had passed out, everyone gathered around and stayed with toy Freddy and Goldie, holding the two would be around even Bonnie, who was being repaired the best the employee's could, soonafter what seem to be hours, Goldie and toy Fredy wake up and see as Goldie had lost his legs and an arm heck even an eye, and looked like a endoskeleton of bags and bones, * time skip* toy Chica was shut off for everyone's safety even Goldie's as Goldie had now had separate anxiety and Gynophobia, he didn't want to be alone or be near anyone that was a girl that even meant Chica and Mari ( the puppet), Dottie, but with males he didn't mind, Freddy had stayed with the toy the most, Foxy was given guard duty to make sure no one tried to steal the two bears again and this went on for a long time until one night 

( cliffhanger my brain is fried now so anyways I hope you all enjoy this chapter and you can ask and dare right away with all of the characters)