Major Spoiler Warning This page contains major spoilers that have not yet appeared in any episodes anywhere worldwide.
This page lists designs and outfits for Alya Césaire. Both final and conceptual designs are presented here.
Alya is brown-skinned and at a medium height with hazel eyes. She has dark reddish-brown wavy hair reaching slightly past her shoulders, with the tips of her hair having a lighter shade of copper red. Above her right eyebrow, she has a beauty mark.
She wears black-rimmed glasses, with a white spot on each side, whereas her outfit consists of a white tank top underneath a plaid shirt with white, orange, and purple stripes; light blue jeans, and white sneakers with black tops.
Lady Wifi has a black butterfly-shaped mask on her face, and her eyes are dark magenta. She wears a black suit, her lower arms and legs white with three stripes that are white above each. On her chest is a glowing light pink wifi symbol, and a thin white line goes around her waist, with the line creating a semicircle above a short vertical white line in the front, resembling a power button.
Over her regular attire, Alya wears cardboard armor. Her helmet is a cardboard box with eye holes and two pieces of cardboard rolls on each side. Her body is covered with one box with arm holes, with the black warning label showing on the front. Boxes and pieces of boxes cover the rest of her body: her shoulders, lower arms, and lower legs. On the lower legs' boxes are black arrow labels positioned to face the front front.
Alya wears a gray short-sleeved pajama top with a lavender design on the front inspired by Majestia's costume, comprised of three stars and two stripes bent into an "M" shape below them. Along with the top, she wears purple, black, and white plaid pajama shorts.
Alya wears a light purple sweater, detailed with a purple diamond stripe, that goes around the chest and upper arms, long, lighter-colored knitted sleeve cuffs, and a brown splotch on each elbow. She also wears a large orange infinity scarf with thin dark orange stripes around her neck, and both the sweater and scarf go over her regular outfit.
Rena Rouge's hair becomes a three-tone ombré, having the roots turn dark red, blending to orange with the tips being white, and she wears her hair back into a high ponytail with an orange hairband. She wears an orange mask with a white bottom half and a black dot above each eye. Two orange fox ears with white insides and black tips are attached to the top of her head. The top layer of her suit, akin to an overcoat, is orange with a white front, a black swan-necked collar, and black arms and gloves up to the middle of her upper arms. The Fox Miraculous becomes a zipper for the black collar. The top layer attaches down the vertical front center, and it has a long fox tail-like coattail that ends a bit below her knees at a sharp white tip. The bottom layer of her suit is orange with a white center on the front of the body and black legs starting at a point on the middle of her upper legs. Her soles are orange with black fox paw print markings. She attaches her flute diagonally on her back when it's not being used.