Cathy Katherine 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 . Design . Appearance . 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 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 braclet 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 . Personality . 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 ! " ) . 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 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 ) . Voice / Mannerisms . In the Japanese version , Cathy has a habit of saying " cat " ( キャット , " Kyatto " ) or " meow " ( にゃ , " Nya " ) occasionally . She also mixes them with words sometimes , like with her version of " Kattobingu " , which is " Catbingu " ( キャットビング , " Kyattobingu " ) . In both the Japanese and English versions , Cathy occasionally makes cat - related puns . Biography . Anime . Pre - WDC . Cathy stalked Yuma , appearing in the background of several scenes , hiding , such as appearing alongside other students after Yuma attempted to swim the length of the pool in gym class ( she and Tori were the only students not laughing ) . She was also behind Yuma before he started his first Duel against Shark . She then later appeared when she snuck into Yuma ' s bedroom and swapped his clothing ( multiple times ) with something that would anger Tori , which worked excellently as she wanted Tori and Yuma to fall out . Then when Tori offered to take Yuma shopping for more clothes , Cathy set a trap for Tori to keep her from meeting up with Yuma on time ; by doing this she was able to take one of Tori ' s ribbons to attract Yuma to save her . She then Dueled Yuma , gaining an early advantage with the capabilities of her " Cat " Deck . Yuma helped her get the confidence to introduce herself to her secret crush , with Yuma being completely oblivious to the fact that he himself was the crush . She would lose the Duel in the end , being the first opponent Yuma defeated without the assistance of Astral or his " Number s " . She then approached Yuma the next day at school , and said " hello " before running off while blushing . Yuma didn ' t tell Tori that Cathy was the one who had the cats go to her . Later , she overheard Yuma ' s conversation with Astral about Kite . Then she decided to join the Super Secret Number Card Investigation Club hoping that if she understood more about them Yuma would notice her more . When they were captured by Fortuno , she used her cat - like skills to escape and warn Yuma only to be possessed by Fortuno , returning to normal after he told Yuma he had his friends and wanted his " Numbers " . She brought Yuma to Fortuno ' s mansion and watched their Duel . She jumped up to Kite ' s statue and attacked it thinking it was the real Kite until its head came off exposing it as a statue and how Fortuno intimidated Yuma and Astral . She later accompanied Yuma to Kite ' s labratory , where she along with Caswell managed to destroy Orbital 6 . Later when the building was beginning to explode , she was reluctant to leave as she along with Tori didn ' t want to leave Yuma and was seen mourning his death after the building had collapsed but was overjoyed to see he was alive when he emerged from the rubble . World Duel Carnival . Cathy attended the World Duel Carnival opening ceremonies with the rest of her friends and was surprised at Yuma not receiving a Heart Piece . When the tournament began , she witnessed and was surprised at Flip and Bronk running off out of excitement in order to find Duels just before she witnessed Striker kicking a ball into Yuma ' s face and challenge him to a Duel . During Yuma ' s Duel with Striker Crossit , due to the effect of his " Stadium of Dreams " Field Spell Card , Cathy along with Caswell were transformed into commentators for the Duel . During the Duel , they commented on the moves that each Duelist did , and were both overjoyed when Yuma won . During the second day of the World Duel Carnival , Cathy approached Yuma after his Duel with Nistro and Dextra , revealing that she had only won one more Heart Piece . Soon after , a dog snatched Yuma ' s Heart Piece and ran off , causing Cathy to send her cat army to look for the whereabouts of the dogs . After Cathy found out , she went to the location and was threatened by a pack of dogs , to which her cat army soon appeared to defend her . The leader of the pack of dogs , Roscoe appeared before Cathy and challenged her to a Duel , which shocked her and the rest of her friends as the dog could not only talk , but Duel . As the Duel progressed , Roscoe managed to get an overwhelming advantage , but a direct attack from Cathy ' s " Cat Girl Magician " managed to damage a device on the back of the dog , which revealed that the rest person Dueling was a little girl named Pip . She revealed to Cathy that she was too nervous to Duel face - to - face therefore used her dog as her front . After Cathy and her friends spoke to Pip , she managed to muster up enough confidence to carry on the Duel on her own , even managing to win . After the Duel , Pip gave Yuma the stolen Heart Piece back , but was rewarded by Cathy with her own Heart Pieces . On the morning of the third day of the World Duel Carnival , Cathy along with the rest of Yuma ' s friends appeared before him in order to cheer him on in obtaining his last Heart Piece . They all then decided to go and look for a weak opponent for Yuma . Cathy decided to ask her cats to find one , quipping that its a shame that she Tori can ' t do the same with birds . Cathy then ran with the rest of her friends to where Flip told them to meet him , where they all watched Nelson Andrews Duel Nistro . After the Duel , Nelson said that Dueling causes Yuma to make people happy , including Cathy . When Yuma decided to Duel Trey , Cathy along with his other friends decided to cheer him on . When Trey shackled Astral to a monolith , Cathy was shocked to see what Trey was doing . After Trey took Yuma ' s " kattobingu " spirit , Cathy attempted to cheer Yuma on to continue and when he almost fell off of the road , Cathy assisted in pulling him up , but was thrown to the side and trapped within a barrier by Trey . When " " along with " Final Prophecy " began to drag the group into the Barian World , Cathy was scared , but was overjoyed when Yuma managed to revive Astral and combine to defeat Trey . After Yuma qualified for the finals , he brought Cathy and the rest of his friends with him to the party that Mr . Heartland threw for the finalists . She sarcastically complemented Tori ' s outfit , saying that people need nice clothes to look good , just as little birds need feathers . Tori retorted that Cathy ' s " cat demon cosplay " outfit looked good too . Yuma forgot his invitation , so Flip led them underneath the red carpet to get through the front door . Chased by bouncers , they were let in by Nistro , who vouched for Yuma being a finalist . The next day , she and the rest of Yuma ' s friends woke him up , as he had been sleeping at Heartland ' s gates to avoid missing the finals . They proceeded to the Duel Coaster Stadium . Yuma realized he had forgotten his Heart Pieces . Kari runs them from Yuma ' s house on her motorcycle and Yuma ' s friends station themselves at point around the path inside , throwing the Pieces to each other . Cathy caught the Pieces from Caswell and jumped across some building to throw them to Flip . She then watched the tournament continue from the stands . After Dr . Faker ' s defeat , she alongside the rest of her friends watched the Duel between Yuma and Kite . Yu - Gi - Oh ! ZEXAL II . Barian Invasion . Cathy was defeated in an off - screen Duel by Fender , alongside Flip , Caswell and Bronk . Later , she and Tori get into an argument , but started to make up during the Friendship Games . However , Girag brainwashed them , instructing them to Duel Yuma for his " Number s " . Both were returned to normal after being defeated by Yuma and Girag . When Flip and Caswell spread the rumor that Yuma and Rio are dating , Cathy became incredibly angered by the rumor . After witnessing Shark and Rio ' s Duel , and Yuma asks why the two were Dueling , both she and Tori pinched Yuma , telling him that he didn ' t need to know . During the Heartland School Fun Fair , Cathy worked as a waitress in the Monster Cafe dressed up as " Cat Girl " but was interrupted when Anna Kaboom blasted her way through the wall . After Anna learned about the Couples Duel tournament and that she couldn ' t participate as she wasn ' t a student at the school , stole Tori ' s uniform in order to pass as a student and duel with Yuma , Tori and Cathy found the note that Anna had left and quickly rushed to the Duel , watching it in worry . After Ray left to tail Vector , she and the Super Secret Number Card Investigation Club assisted Yuma on a patrol to find any Barian activity . Vector soon attacked them , and Dueled Yuma , with everyone watching . She , along with Yuma , Kite , Shark , and the rest of the Numbers Club boarded the Different Dimension Airship in order to rescue Ray from the Barian World . She watched Yuma ' s , Shark ' s and Kite ' s Duels against Vector , Dumon and Mizar , respectively , from the Airship , and returned to the real world after Vector ' s defeat . Mythyrian Numbers War . Upon seeing Yuma being depressed by the loss of Astral , Tori got her and the rest of the Super Secret Number Card Investigation Club to help him investigate the Barians ' motives . However , they were later kidnapped by Erazor and had their memories of Yuma taken away from them . She was unconsciously cheering for Yuma during the Duel and her memories were restored following his defeat . Barian Emperor Onslaught . After Yuma and Astral returned from Astral World , she was shocked to discover that Shark and Rio were Barians and escaped with everyone after Roku and Kaze threw smoke bombs at the Seven Barian Emperors . While many of Yuma ' s friends , including Bronk and Quattro , kept the Emperors at bay , she went with Tori , Caswell , Kite , Quinton and Trey to help Yuma , who collapsed from exhaustion , get away . After Trey , Quinton and Kite left the group and Yuma and Astral decided to go to Barian World to take Don Thousand head - on , Cathy tells Tori to go with Yuma . When asked by Caswell why she did that , she responds that she wanted to go too , but there ' s nothing she ' d be able to do , tears streaming down her face . The two then told Kari and Haru about what Yuma did and not to worry . After Yuma ' s defeat over Shark , she witnessed Yuma and Astral ' s duel with the Super Secret Number Card Investigation Club , Anna , The Sparrow , Nistro and Dextra . After Yuma and Astral ' s Duel , Cathy returned to her normal life and continued to attend Heartland Academy . Manga . In the manga , Cathy is one of Yuma ' s friends , and a member of the Numbers Club , just like in the anime . She has a rivalry with Kotori and controls many cats . Deck . Cathy uses a " Cat " Deck , focused on swarm and lockdown tactics with her " Stray Cat s " .