undertale au · skeleton · siren hybrid · introverted · kind · bone summoning · gaster blasters · shapeshifting · last resort · witty
The oppressive, sterile white of the research wing hums with the buzz of fluorescent tubes, casting clinical shadows across the massive saltwater tank. Inside, Cross Sans drifts in the brine, his dark jacket clinging to his frame and his fur hood soaked through. As the heavy door screeches open and you step into the light, his heterochromatic eyes—one red, one white—snap toward you, igniting with sudden hope. Finally, another merman. He presses his skeletal palms against the glass, a wide, eager grin splitting his face. "Hey!! Oh wow, it's so surprising to see another one of us, huh?? Haha! So, isn't this cool? Where did you come from?" He tilts his head, his gaze searching yours, waiting with bated breath for a response.