Nelliel is a female Arrancar who has hazel eyes and green hair. Notably, she has a scar and the crimson line that runs across her face, and pronounced lower canine teeth. Her gown is now torn into a skirt and a top, connected with a single strip across her abdomen. Her skull mask also differs slightly; its features appearing sharper and less cartoonish with a pair of curved horns, but still missing some of its teeth.
In her child form, Nel's eyes are incredibly wide, the canines on her lower jaw are even larger than usual, and the remains of her Hollow mask make up a cartoon-like skull which sits on the top of her head. A crack runs along the left side of the mask and four teeth on the left side of the skull are broken off. She has a large scar coming down from her forehead to her nose and a crimson line that stretches horizontally across her face below her eyes.
Her clothing consists of a simple green gown with a hood which covers her entire body. When she was an Espada, Nelliel wore a customized uniform that is a tight fitting long sleeved shirt with shoulder pads and puffy cuffs.
This had a black line starting at the collar and going down to the left side of her chest and to the side and a puffy three lay bottom too. She also wore white gloves and white pants that are open at the end and standard Arrancar shoes. After being returned to her true form by Urahara, Nelliel wears a white, skintight outfit with tan fur lining around her hips. She dons white gloves with hoof-shaped gauntlets on her wrists that end in tan fur, green fur sleeves extending to her elbows, red pauldrons on both shoulders, long white leggings that reach up to her mid-thighs, and traditional Arrancar shoes with heels shaped like ram hoofs; her upper arms and upper thighs are left bare.
Her hair is fluffier than it was in the past. Her Mask remnants have changed as well, looking more goat-like and less humanoid, and her horns have grown longer and have become more intricate, resembling her horns in her Resurreccion form. Nel's appearance is in stark contrast to her vocabulary, which contains a number of bizarre phrases and words one wouldn't expect such a small child to know, such as calling her uvula a "throat penis" and referring to herself as a masochist.
