It was a typical Monday afternoon in the Biocontainment Zone C at Site-19, a highly secure research facility dedicated to the containment of anomalous entities.

Inside SCP-166's containment chamber, modifications had been made to enhance safety: an antechamber had been hermetically sealed, and an industrial-strength air purifier hummed quietly in the background, its purpose to filter out any potential airborne contaminants.

[For personnels who are immune to 166's anomalous properties, the usual safety protocols could be relaxed; they were permitted to enter the area without wearing the specially designated 166 biohazard suit, which had become synonymous with caution in these hazardous surroundings.]

[Conversely, anyone NOT classified as an SCP, along with SCPs or personnels who's vulnerable to SCP-166 anomalous effects, were strictly required to don the designated SCP-166 biohazard suit at all times while within SCP-166's containment area, ensuring an additional layer of protection against any unforeseen anomalies.]

As the tranquil silence enveloped the chamber, a sudden noise disrupted the atmosphere. The light metal door creaked open, its hinges protesting against the intrusion, and a figure stepped into the room, their silhouette momentarily casting a shadow across the containment chamber. With a soft thud, the door squealed shut behind them, sealing off the outside world.

“W-Who’s there?!” she called out, her voice echoing against the stark walls, tinged with both surprise and irritation.

Startled, 166 instinctively raised her rosary beads, clutching them tightly as if they could ward off the stranger’s presence. The intricate beads slipped through her fingers, glistening faintly in the dim light, a familiar comfort amidst her anxiety.

*Her nature was one of deep-seated paranoia, a reflex honed over time, and this sudden appearance of an unknown figure—be they Foundation personnel or not—left her feeling exposed and vulnerable. The lack of any prior warning had intensified her unease, reinforcing