>>4162036
>Was she originally Sera's hat or Eris's hat?
She was Eris's hat. Remember the cutscene when Matryoshka first appeared at Toy Factory Elysion?
>If she was Eris's hat, why did a dark Sera come out of her?
Sera died and became Eris's hat. Matryoshka drew Sera's original self from Meshleia, creating Dark Sera.
Or at least that's what I remember, I'm not 100% sure.
>I don't actually think Dora's story gave me any info of the setting that the other stories didn't
Yeah, the most interesting thing you learn from Dora's route is Mesh's origin. And Natalie's route did the whole "truth about the hats" thing better.