ceremonial gowns of a queen
褘 centers on a specific type of formal attire: the ceremonial gowns worn by a queen. It is a specialized character for royal vestments.
褘 combines the clothing radical 衤 with 韋, which likely contributes the sound. The character is historically associated with royal ceremonial dress.
The clothing radical 衤 beside 韋 suggests a garment of high status. Picture a queen's elaborate ceremonial robe, richly decorated and unmistakably royal.
For イ, imagine the queen's gown being so fine that it's easy (イージー) to recognize her authority: easy -> イ.