Capture the eerie and enchanting essence of an anthropomorphic aye-aye adorned in a mesmerizing vampire costume, set against a detailed and atmospheric background. The aye-aye's slender, elongated fingers gleam with wickedly sharp claws, contrasting against the rich, velvety fabric of its crimson cape. Its eyes, a piercing shade of crimson, gleam with an otherworldly intelligence and a hint of mischievousness. The aye-aye's fangs, sharp and glistening, peek out from beneath its lips, adding a touch of danger to its otherwise captivating appearance. The background is shrouded in darkness, with eerie moonlight casting long, eerie shadows across the ancient, gnarled trees that loom ominously in the distance. A faint mist hangs in the air, adding to the eerie and haunting atmosphere of the scene.