Wonder Girl has a slender yet muscular build with blue eyes and blonde hair with unkempt bangs. Her hair is long, running down her back, and she wears a black headband.
She wears a black sleeveless top with two stylized golden W's on it, which resemble the W's that Wonder Woman wears across her camisole. She has red pants with two white stripes on the sides, and blue shoes. Like Wonder Woman, she wears two silver bracelets and star earrings (though silver instead of red), and uses a golden lasso that hangs at her waist.
Wonder Girl is a very tough young girl, with a very energetic, carefree and eager personality. In general, she prefers taking on foes stronger than herself. She loves to fight, and enjoys missions in which there will be physical confrontations. Sitting on the sidelines is less to her liking.
She can occasionally lose focus when impressed by something, but can regain focus when corrected. Her teammates have also remarked that stealth is not her strong suit.