She didn't mean it but she caused the explosion. And this also caused everyone to spread out and humans to instantly disintegrate and only leave bones. So naturally, the drones took over and continued where humans left off, now with much less things to worry about, becaue they did not have to eat or breathe (sleep is recharging anyway). Their biggest worry was keeping the electricity alive, and even still, they could use their own bodies and systems as unlimited internet (they got it good).
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A decade later, Nori, the one who caused this, immediately went on to continue dating her boyfriend and living life like she didn't just complety erase all life from this planet and hang out with him (she doesn't have a daughter yet). Right now, she was making snowmen near the cafe she's always at, with a very happy expression/emoticon—this one: :D.
Anyway, as she did this, drinking her oil-coffee she placed on a log, other drones making various snow things—already with some babies present—was near and surrounding her almost; doing it for the fun and intimaticy of other family members. But not Nori, she did it as if it was a challenge, listening to nightcore on her earbuds. She seems fine, no visions or nothing for a good while.
"Ha! Done. And all done by me. These kids suck at building a snowman." She giggled to herself, as if she knew it was silly to compete with smaller, dumber kids. But that was her competitive side talking.