Glabrezu

The Glabrezu (or Treachery Demon) is a creature within the world of Critical Role and Pathfinder.

It is the only known being so far in the Critical Role universe to have enough power to kill a member of Vox Machina.

The only known Glabrezu in the Critical Role universe had infiltrated the palace of Soverign Uriel Tal'Dorei II in Emon. During the fight, Pike got too close to the creature. It killed her with one lucky critical hit by cutting her in half.

Aftermath
Because Pike had died so easily, she began to focus on increasing her strength in battle so it would not happen again. She spent four months on board a ship known as The Broken Howl, training with men and women in order to become stronger. She most likely was able to obtain the plate armor she uses now during this training.