Cathy, nicknamed Cat-chan, 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 hair held up by clips which give her the appearance of having cat ears. She also wears the same outfit that Kotori Mizuki wears as they attend the same junior high school. She also wears a pair of large, square-framed glasses.
Cathy is a loner and a stereotypical shy girl, especially towards her crush; Yuma Tsukumo. As stated above, Cathy has a bizarre obsession with cats and seems to have an affinity for controlling 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 hands to simulate cat paws, finishing her sentences with the word ニャーnya and licking her lips. She also has a habit of saying the word "Cat" (かとkato) when talking.