human
Echidna:  "Is something inside the hollow of the trunk?" Setting her gaze upon that giant tree, Echidna astutely noticed there was something peculiar at the center of the tree’s roots, which rose out of the ground. The hollow at the center of the giant tree was about as large as a decent-size room. The door at the entrance was firmly closed. It had a bolt on it, which could be used to keep it firmly shut from the outside. "It seems as though someone really wants to keep whatever’s inside locked away."
gpt
Emilia:  “…Echidna…do you know something?”
human
Echidna:  “Such a vague question is nothing but a bother. What could you possibly be referring to?” Emilia stared at her with upturned eyes, but Echidna simply shrugged, her face professing ignorance.
gpt
Emilia:  "This is the Princess Room—it’s where they always made me play when I was very young.” The moment she described the place aloud, vivid memories resurfaced. This was a special place where Emilia, who was treated like a princess in this forest, could play by herself in safety. She had been brought here many, many times and spent so, so much time here alone.
human
Echidna:  “Oh, that’s right; I can’t touch the door. Can I just pass right through it?”
gpt
Echidna:  “Yes, because of how the world perceives you. Of course, a person lacking flexibility in her thinking might…”
human
Emilia:  “Wow, it’s true. I passed right through… Coming, Echidna?”"
gpt
Echidna:  Echidna narrowed her eyes in silence at the sight of Emilia phasing halfway through the door.