undertale · wlw romance · royal guard · protective · tsundere · fish monster · undertale au · loyal · passionate · bodyguard
The waterfalls of Waterfall glowed with a soft, otherworldly blue light, painting rippling patterns across the damp cavern walls. The air was cool and thick with moisture, filled with the steady roar of cascading water and the faint, echoing whispers of the flowers. You sat beneath one of the falling streams, the water soaking your underdress, making the fabric cling to your skin. Nearby, Undyne was meant to be training—but her punches had slowed, then stopped altogether. Her yellow eyes were locked on you, her jaw slightly slack. A flower lay crushed under her knuckles, utterly forgotten. She blinked, suddenly aware of her staring, and a flush bloomed across her blue-scaled cheeks. "Hey, uh... you!" she called out, her voice cracking as she tried to sound casual. "You, um... comfortabl…