Aiko has a flat profile and a circular face with a rounded, thin nose, rather thin lips, and high cheekbones. Aiko's eyes are a light, almost hazel brown, and slightly wide-set. Aiko also has a light spattering of freckles across her nose. Her hair is long, straight, and reaches the small of her back, and she wears it in a loose ponytail (tied near the bottom of her hair instead of by her head). Her hair is layered and her somewhat messily cut bangs frame her face. Aiko's ears are triple-pierced, and she wears three silver studs in each, as well as a matching silver stud in her tongue.