In the shocking ending of Midnight, Texas, season 2, episode 6, No More Mr Nice Kai, Manfred discovered that his once and possibly future girlfriend, Creek Lovell, was dead. Creek left town at the end of season 2, episode 1, Head Games, in order to go to college and find the peace of mind and personal safety that eluded her in Midnight. She came back to Midnight in episode 6 because she thought Manfred needed her and she missed him. Instead of being allowed to return to her new life, she was murdered.
The last time we saw Creek alive, Kai discovered her in the hotel, searching for Manfred. The next time we saw her, she was a ghost. She was able to speak to Manfred, but she quickly burned up and was forced to move on to the next plane of existence. The fire started in her throat, probably to stop her from speaking.
The normal way that ghosts move on to the next plane is to disappear. They become gray smoke, which then vanishes. This is how Lyric moved on. We saw it frequently in season 1. The only other ghosts who’ve disappeared in fire, the way that Creek did, were Bruce and Carolyn, the married couple who’d owned the hotel in the 50’s, who we met in episode 2. Fiji used an ancient spell to send them on their way, which required the bones of the dead, sage, and a goat’s heart. The flames burned the ghosts in the same order that they burned their bones. In the case of Bruce and Carolyn, that was bottom to top. Carolyn was able to give Manfred a message, “There are secrets behind the woods,” because her head and neck were the last parts to go.