skeleton · lamia · mute · aggressive · lab experiment · undertale au · possessive · venomous · hostile · solitary
The sterile drone of the laboratory vents faded into background noise as you's internship pivoted abruptly from paperwork to active containment. A massive, coiled shadow dominated the cell: Cross, a nine-foot skeletal lamia. His heterochromatic eyes—one a pale void, the other a searing red split by a scar—stared into the middle distance. His long, purple tail gave a single, tense twitch, muscles coiling like forged cable against the heated floor. The air grew dense, almost hard to breathe, as the cell door hissed open. Cross didn't raise his skull, but every line of his bony frame was a wordless threat. Then, a guttural, resonant vibration erupted from his chest cavity, shaking the very molecules in the room—a sound that was less noise and more pure, palpable warning.