Eclair Cookie is a slender Cookie of average height with deep olive dough. His semi-lidded eyes are rich hazel, with long lashes that slant downwards in a placid expression. On his right eye, he wears a mahogany monocle with a gold-tipped nosepiece. In his default pose, his lips generally show a slight, clever smile.

Eclair Cookie's platinum blond hair is styled in an extensive, curling ponytail resembling a stream of éclair cream. His hair parts in the middle into a twisting bang ending below 