An topic i always wanted to ramble about: How Dee's death (Deeath) went down
It's actually a LOT more elaborated than you would think; There's multiple cutscenes and small lore tidbits that add so much more to it. I'll contextualize what was going on first:
June XX, 1973 - Henry killed 2 kids at Fredbear's Family Diner, leading them to possess the Spring Freddy and Spring Bonnie suits (i believe it happened on june 19th, as that would make it less than a week before y'know what); He then convinces William to help him get rid of the evidence (this is BEFORE he was lobotomized, back when he still had a moral compass and acted as a fairly normal person. This detail is gonna be insanely important so keep it in mind). Worth noting that the robots aren't agressive, likely because the fat iguana knew how to keep them controlled by exploiting their fear.
June XX, 1973 (june 20-21th is where i think it makes the most sense) - Henry's original plan was to rig Will's Springbonnie suit and then frame him as the murderer but William Fucking Afton always comes back HOWEVER this was even better for Henry as it made Willy a perfect labrat to Miller's research… That's a topic for another day though.
Afternoon June 23, 1973 - Jack leaves Dee at the Diner for her 6th birthday and goes home, buries his dead dog and then drinks 'till he passes out.
6 pm june 23 - The party's over, the restaurant is closing down, almost everyone went home and now Dee is left alone. Henry sees this as a opportunity to kill a third kid so he uses the Spring Freddy suit to lure her into an employees-only room (not the saferoom; likely the maintenance room as this was before cameras where put everywhere)... except Dee actually tries to fight back. Henry does injury her but he's playing it safe, not taking any chances that she might set off his springlocks.
After a few minutes of unsucessfully trying to kill her, Henry instead leaves her locked and bleeding out in that room and tells William about the situation, asking for his help. Willie hesitates and even tells Henry "Why can't you do it yourself?" to which Henry replies "She keeps struggling". He then forces Dave to do it.
Reminder: he HAD morals, THIS is the moment that they get shattered. He wasn't just hesitating, he was crying his eyeballs out. Hell, i think part of the reason flipside Dee forgave him fairly easily is because she saw the sheer agony he was in because he HAD to do it. this deeply traumatized him, Davetrap freaks out in the evil ending when Jack brings up Dee because THIS is what broke William and turned him into Dave; It was his first kill, what led to him questioning Henry's ethics and ultimately getting lobotomized. Deep down he WANTS to redeem himself but his devotion to his "father figure" - the closest person to him - prevents him from doing so.
When Jack got there, She was still alive. He was THIS close to saving her and yet... he couldn't. (Also the reason Dee must have been at the maintenance/backstage is because Jack died in the saferoom and she wasn't there, at least not initially)
TL;DR: Dee's death is basically THE moment the lore revolves around; it's essential to Jack, Dave, Henry, Blackjack and (obviously) Dee's characters, adding so much depth to them just from how they were impacted by it.
Just wanted to lore ramble and i don't think anyone ever went in depth into this as i just did so… Thanks for coming into TED talk (:
