Rika actually could explain, or at least she thought she could explain, if her assumption that this was an L5 patient was correct. But Edward was dragging them away and Rika wasn't complaining, trying her best to keep up without falling.

The woman was quicker though. Rika heard the doors slam shut before she could really register it, but the realization that they were trapped with a woman who was brandishing what looked like a hot fireplace poker hit her soon enough.

Again... Again! Why was she always trapped? Even when she was not in Hinamizawa, she was always trapped!