Yes, a vampire story involving Voltron :) I think this may be a first, but I could be wrong. This takes place late in DoTu. It's rated T for minor violence, gore and cursing, but as vampire stories can be frightening, please read at your discretion.
The night air was crisp in the late summer of Arus and a mist hovered over the ponds, meadows and the vast Lake Arus. Around the castle, it was all so quiet and eerily still, the inhabitants innocently unaware of the terrifying events that would soon transpire. Dressed in her pale lilac nightgown and lying asleep on her side with her windows opened slightly with the thin, transparent curtain swaying slightly in the faint breeze, Princess Allura appeared peaceful. Her silky glowing hair rested on her pillow as her subconscious mind conjured up images of Keith with her picnicing along the shores of Lake Arus and indulging in kisses while so deeply in love. A smile formed on her soft face as she enjoyed this most romantic dream.
High above the trees and making its way to the castle, to the princess's room, a bat in flight flapped its black wings barely making a sound. Through the opening in the window above her bed, the bat glided in before it landed at the edge of her bed near the bedpost. In a blink of an eye, the bat then transformed into a human-like creature, his presence menacing and frightening should he be seen. He was a vampire, a creature of the night thirsty for royal blood. Dressed all in black, his hair slicked back, his gray eyes cold and hollow, he stared at the beauty in front of him resting in the bed. As he roamed closer and closer to her, the crook of her beautiful neck seemed to beckon him. He had seen the princess many times before and had fantasized about tasting her savory blood that coursed through her veins. It wasn't long before Allura's eyes slowly opened to a soft gaze as she awakened, turned over and stared at the tall, dark figure at her bedside. The half-moon outside cast a ray of light into her room illuminating the figure, who in her mind was Keith paying her a visit.
"Keith, my love, you've come home," she murmured, her sleep-glazed sapphire eyes staring into his seductive ones entrancing her. Bending down, the vampire opened his mouth, his gleaming-white incisors then bit into the warm, flesh of her neck, drawing in her crimson nectar. A loud gasp escaped her lips as she found herself taken by the this ravishing ordeal and before she knew it, her consciousness enveloped into blackness.