Wonder Girl (real name Cassandra "Cassie" Sandsmark) is a member of the Team. 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. When her Stealth-tech is active, her entire costume, shoes and all, turns black, with the exception of the stylized W's, which turn gray. 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.

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