She is voiced in English by Haviland Stillwell.
Avea Trotter has pale purple skin, but it is darker on the horse part of her body. She has feathery wings that fade from black to turquoise and her blue eyes have bold pink feathers surrounding them. Both her head hair, done in a ponytail, and tail hair is blue. She has horse ears. Her main outfit features a black top hat with red trim. On her hands are black gloves. She has on an outfit that resembles a equestrian's uniform, with blue ruffles along the collar and bottom. Around the waist of the top is a black belt with strands hanging off it.
Avea is a stubborn, opinionated ghoul who tends to take charge, and can be very blunt toward others. Like her longtime hybrid friends—Bonita, Neighthan, and Sirena—, Avea has a history of going from school to school because she had trouble fitting in with other students. This has made her somewhat guarded and distrustful toward others. But after her adventure with Frankie and the other ghoulfriends in Freaky Fusion, she has since learned to open up to others, and feels more accepted at Monster High than anywhere else. Her favourite activity is running as fast as she can.
As a hybrid, Avea's parents are two completely different monsters. Her father is a centaur scientist who specializes in researching monster remedies and medicine, and her mother is an harpy who is his research assistant.