Wendy is a petite girl with fair skin. When she is first introduced in the series, she has long, dark blue hair that reaches down to her waist, with two bangs framing her face which reach down to her chest alongside her brown eyes. She later cuts her hair down to a bob cut during her battle with Tartarus. Like all Dragon Slayers, she has elongated canine teeth. At first, she wears a simple dress with two wavy stripes running across the dress and ending in small pointed edges at the bottom. Around her arms and legs she wears wing like attachments. Wendy's Cait Shelter Guild stamp was located on her right shoulder, but after the Guild disbanded and she joined Fairy Tail, the stamp was replaced by Fairy Tail's Guild stamp.
During her time in Edolas, Wendy wears her hair up in pigtails held together by two animal ear like attachments. Two strands of hair hang down on each side of her face. She wears a long sleeved top with two buttons in the center and an ascot around her neck. The top is adorned with a small pattern around the shoulders and a small trim around the upturned cuffs. She wears a frilled skirt with a small trim running around right above the end. She also wears thigh high socks.
While on Tenrou Island, Wendy wears several different outfits. At first, she wears a flowing dress with a triangular pattern near the top and crossing pattern around the rest of the dress. She wears a thick band around each of her arms and ankle tied sandals on her feet. Later, Wendy receives new clothing from the Celestial Spirit World. It is a simple kimono with a black waistband and small tie over it. She wears thigh high socks and wing like attachments in her hair to keep it up in pigtails. After being saved from Hades' attack, Horologium gives Wendy new clothes. They are a suit like top with a light trim and large cuffs and dress shirt with tie. She wears a small skirt with a large sash holding the top and skirt together. Her hair is let down and she wears dark stockings.
During the Grand Magic Games, Wendy wears her team colors in a long sleeved dress with a flower pattern adorning the sleeves. She has a small tie with ribbons holding her hair in pigtails and stockings.
Wendy is a very shy and polite girl. She is always accompanied by her Exceed companion, Carla, as they have a very close relationship. She is very eager to try and make friends. Wendy also cares greatly for her guild members, and even suggested going to the home-town of the Exceed to try and get them to evacuate when they were under threat. Wendy is becoming more confident and brave as time goes on, and she always tries to be of help wherever she can. She is intelligent and has a very honest personality, is "direct and open with her emotions", and is easily swayed by the people around her. However, this also causes her to be "very romantic". She can be spontaneous and "very ditzy". Unlike the other Dragon Slayers, Wendy doesn't enjoy fighting, preferring to avoid it as much as possible. If, however, it's for the sake of her guild or friends, Wendy will fight without hesitation. However, after Doranbolt saved her and Carla from dying, with the destruction on one Face, Wendy cut her hair, deciding she would no longer cry and whine, and would continue to fight as long as her friends are fighting as well.
Wendy was raised by the female Dragon Grandeeney for some time. However, one day, along with other Dragons, Grandeeney suddenly disappeared and left Wendy alone. After wandering around trying to locate her lost mother, Wendy ran into Mystogan, who introduced himself to her as Jellal. Mystogan allowed her to travel with him, though he was also hopelessly lost on the road. One day, Wendy heard Mystogan utter something by the name of "Anima", and shortly after deemed it too dangerous for Wendy to travel with him further.[18] He left her in the care of a close guild by the name of Cait Shelter, where she stayed until she was chosen by her guild to aid the Allied Forces in their mission against the Oración Seis.