Paige

 "Paige, as a Guardian Angel, had a strong belief in the Elders and the structure of Good. She could not accept the idea that a respected Elder like Gideon could be evil.

Chris screamed, begged, and gave countless warnings. Leo also suspected Gideon. But Paige repeatedly dismissed Chris as paranoid. She prioritized ""law"" and ""order"" over her intuition and the warnings from her own family.

Her stubbornness created a barrier, preventing her sisters from taking drastic action against Gideon sooner. By the time she realized the truth, it was too late. The horror and regret on her face when she realized she was wrong could not make up for her fatal mistake.

While Chris is desperately warning of a major threat, Phoebe decides that the most important thing right now is to... take a break from dating to ""find herself."" Her lack of timing is astounding. Her family is on the brink of tragedy, and her priority is her personal love life.

Throughout season 6, Phoebe has been using her premonitions to find the perfect man, instead of focusing on protecting the innocent. Her being stripped of her premonitions by the Magical Tribunal is a direct result of this selfishness, showing that she has strayed from her mission as a Charmed One.

Phoebe's self-centeredness has distracted her family at a time when they need to be united and vigilant the most."