Ash
The second of the three pyramids Ash would need to destroy before she could return and help her friends was found in one dark, damp location. The Grey Chamber's dungeons. Here, Ash in one of the prison's many cramped cells, Ash punched through another.
With two down, there was only one to go.
However, the longer Ash remained in this portal, the louder her own heartbeat became in her ears. She believed she hadn't even been inside for a minute, but every second may as well have been a year due to the fact that Niven continued to whisper terrible things to her throughout that time.