Cathy Katherine, known simply as Cathy (キャッシー, Kyasshī) in the manga and Japanese version and nicknamed Cat (Cat-chan in the manga and Japanese version), is a supporting character appearing in Yu-Gi-Oh! ZEXAL and one of Yuma's friends. She has an obsession with cats to the extent that she behaves like them and can control and communicate with them. Cathy, like her nickname implies, has the appearance of a cat. She has two pieces of her gray hair held up by clips which give her the appearance of having cat ears. She has large and expressive green eyes which appear to have no eyebrows. She also wears the same outfit that Tori Meadows wears as they both attend Heartland Academy (in the dub, her skirt is lengthened). She also wears a pair of large, square-framed glasses. She also has a pink Duel Gazer with a purple lens that she wears with her glasses off, in contrast to Flip, whose Duel Gazer is directly integrated into his glasses. In the first series, Cathy's casual outfit consisted of a mostly black dress with a white cat tail attached and clawed gloves. She has black and white over-knee-high socks and black Mary Jane shoes. In the second series, it consisted of a lilac T-shirt with torn-ended sleeves and a red tie, black shorts held up by suspenders (the shorts are lengthened in the dub) and maroon ankle boots with accessories being a collar, matching bracelet on her right wrist and a star earring on her right ear. She wears a bell with both outfits. When attending social events such as the World Duel Carnival party, Cathy wears a Chinese style dress, which like most of her other outfits, sports cat like features such as a tail and gloves with the appearance of cat paws and claws. During the Heartland Academy fun fair, she wore a "Cat Girl" cosplay. Cathy is a loner and a stereotypical shy girl, especially towards her crush; Yuma Tsukumo. However, she has shown to have a strong distaste towards dogs (when Pip tried to ask the gang for forgiveness, she brushed it off and displayed much anger, calling them "thieving Dogs!").[4] As stated above, Cathy has a bizarre obsession with cats and has the ability to communicate with them. Her obsession goes to the point that she decorates almost the entire interior of her house with cat-themed paraphernalia. She has a habit of dressing up in cat-themed clothes in the Gothic Lolita style and sometimes exhibits cat-like behavior, i.e., curling her fingers to simulate cat paws, finishing her sentences with the word ニャー nyā and licking her lips. She also has a habit of saying the word "Cat" (かとkato) when talking. When angered, she has a tendency to lash out at Flip with her cat claws, scratching his face (this is cut from the dub). Cathy uses a "Cat" Deck, focused on swarm and lockdown tactics with her "Stray Cats".