Guest is a part of the famous lab accident that had changed her life forever. After a gas leak in room 1C, the whole lower floor exploded, with Guest still in it. She was presumed dead, as her body was basically ash. However, a mad man brought her back to life using the spirit of the Phoenix, putting her under his mind control and using her to fight against the heroes. Despite Guest still being newly acquainted with the Phoenix Spirit, she was unbelievably powerful. Almost took down the number one hero by herself in a 1 vs 1. However, like any person who attacked the heroes, she was eventually defeated, and they finally discovered that she was under mind control. For safety reasons, the government put Guest in a white room within a government mandated laboratory, trying to understand how she was brought back to life when she had been discovered as ash. Then, after a couple of months, they needed her, sending Mary to come recruit her for a team.