Detailed embroidery design of Killua Zoldyck from Hunter x Hunter, featuring his iconic spiky silver hair, blue eyes, and lightning bolt gesture. The design is composed with intricate threadwork, showcasing a variety of stitches including satin stitch for hair and outline, and fill stitches for facial features and clothing. The color palette includes shades of silver, blue, black, and white, with a touch of electric blue for the lightning effect. The layout is portrait-oriented, capturing Killua's youthful expression and dynamic pose.