Phoebe was a really tragic character
I see a lot of topics and people complaining about how stupid and unlikable Phoebe's character was, but have these people really seen Dark Matters?
In Dark Matters, Phoebe started out as a naive, curious kind-hearted person who wanted to show her powers to the world, it seemed, at least to me, that she was going to be the main hero of the show and save the world, then everything went to hell once she got kidnapped.
In Heroes Reborn, Erica brainwashed Phoebe and corrupted every single bit of kindness and empathy that once existed inside Phoebe's heart, turning her into a cold-blooded psychopath who murders people and laughs in the edge of her insanity, and one of the main villains of the season.
One would think that she and her brother would get a happy ending in the finale, but instead Quentin had to kill her, his own sister he was looking for the entire series and what started Heroes Reborn.