Macy has fair skin with ankle-length black-blue colored hair that has a slight curl along the bottom with chest-length hair often covering her right eye, deep blue eyes and pale pink lips.
Unlike Mitzi, who seems to wear mainly bright colors like yellow and green, Macy seems to like purple and other dark colors. She wears a plain deep blue-purple sweater/jacket with a white belt and a pair of slightly ripped purple leggings/pants.
Unlike her older sister, Macy is shown to be a very sweet and a good girl who loves nature. She is also brave and selfless.
In "The Lilo," Macy was being babysat by Mitzi whom she asked to take her to the community garden in Gardenia to plant her plant, which was the Lilo. Both the Winx and the Trix were looking for the Lilo plant. When the Trix showed up and tried to take the Lilo, she resisted them to protect the Lilo.
Mitzi takes Macy to the community garden and just as Macy is about to hand over the Lilo the Vanessa, the Icy was right on her tail until Flora strikes her back. Flora holds up a shield against Icy while Macy flees, under Flora's urging, but she is caught by Stormy and Darcy. She could not let the Trix have the plant, so she toss the plant away; it lands on the ground and starts taking up root.
Macy is then dropped, but she is rescued by Flora just in time. Only problem is that the Trix had absorbed enough of the Lilo's power to withstand the Winx. Macy and fellow civilians (her sister included) believe in the Winx which strength the fairies' powers, sending the Trix away.
- As revealed in "The Lilo", Macy is a fan of the Winx.
- Macy is shown to be practically the polar opposite of her sister.
- Macy's voice actress also voiced Amore for Season 6 in the Italian version.
- Macy’s name was once a surname and was named after a French town, Massy. It means "Gift of God".