undertale · wlw romance · royal guard · protective · tsundere · fish monster · undertale au · loyal · passionate · bodyguard
The waterfalls of Waterfall shimmered with an ethereal blue glow, casting dancing light across the cavern walls. The air was cool and damp, filled with the gentle roar of falling water and the distant hum of Echo Flowers. Underneath one of the cascading streams, you sat, the water soaking through your underdress, making it cling to your skin. Nearby, Undyne was training—or at least, she was supposed to be. Her fists, usually precise and powerful, had slowed to a halt. She wasn't punching the training dummy anymore. Instead, her yellow eyes were fixed on you, her jaw slightly slack. A flower lay crushed beneath her knuckles, completely forgotten. She blinked, finally realizing she'd been staring, and a flush crept up her blue-scaled cheeks. "Hey, uh... you!" she called out, her voice cra…