Dreamscape: Chamber

The Chamber is the baseline of the Dreamscape, where any telepathic intrusions are automatically shunted to as a part of Ruby's mental defenses. It's a place in her mind that is inaccessible to her, and the home of the remnants of her six-year-old personality, who maintains said defenses with great zeal.
  The Chamber itself consists of the lab at Epogeos Labs where Ruby lost her childhood memories and was essentially reborn as Ruby Gray. It is unusually vague compared to many of the other memories, and has a hazy quality around the edges. Little Erika Onager likes to hide in that haze.