This PVC figure depicts Lambdadelta in a commanding, mischievous pose that captures her persona from Umineko no Naku Koro ni. The sculpt emphasizes her layered outfit: a long, flowing dress in deep purples and midnight blues, accented with gilded trim and delicate lace textures along the hems. A sweeping cape billows behind, enhanced by subtle shading that suggests wind and movement. Her hair is rendered with fluid, sculpted strands that frame a confident smile and piercing eyes. The base is designed with arcane sigils and a polished platform that raises the figure for dramatic display. Hand-painted details highlight the jewel-like accessories, the gradient of the fabric, and the fine texture of ruffles. Overall, the piece conveys elegance, magical danger, and the character's playful, enigmatic aura.

Within the Umineko no Naku Koro ni storyline, Lambdadelta appears as one of the witches who preside over The Game of the Golden Witch. Known for certainty and a love of riddles, she toys with clues, shifting perception and tempting participants to challenge the truth. She moves through the narrative with a theatrical flair, orchestrating scenes that blur the lines between fact and fiction, and she often embodies a playful yet dangerous foil to Beatrice and the series's human protagonists. Her presence signals a test of logic, trust, and interpretation, as players must weigh evidence, motives, and magical influences. Lambdadelta's influence extends beyond individual chapters, representing the seductive lure of absolute knowledge and the danger of forgetting that mystery thrives on doubt. This figure seeks to capture that paradox, inviting fans to ponder the boundaries between certainty and illusion.