Cathy ( manga ) Cathy ( キャッシー " Kyasshī " ) , nicknamed Cat - chan , is one of the main supporting characters appearing in " Yu - Gi - Oh ! ZEXAL " manga and one of Yuma ' s friends . She has an obsession with cats to the extent that she behaves like them and can control them . Biography . Cathy has a crush on Yuma and often argues with Kotori over him . She is part of Yuma ' s circle of friends , with Kotori , Tetsuo and Takashi . After Yuma lost to Kaito and got depressed , Tetsuo formed the Numbers Club together with Kotori , Cathy , and Tokunosuke , in order to help Yuma collecting the " Numbers " . Cathy accompanied Yuma and the rest of his friend to Heartland Theme Park to search for " Number " cards . She went on the Nature Crooz ride with Tokunosuke and then took the rest of Yuma ' s friends on the ride again . Yuma was separated from them by Captain Corn . When Cathy and Kotori notice it , they jump off of the track in order to find Yuma . Tetsuo , Tokunosuke and Takashi then had no option but jump off as well . As Yuma Duel ed Captain Corn , the mine carts continued to move down the tracks towards them . They ended up falling the down the tracks , with Tetsuo managing to cling to the tracks while the the rest cling to his legs . Captain Corn changed the direction of the tracks with a lever near them , which caused the mine cart to speed towards them , where it would run them over . Cathy jumped from the bottom to make it to another lever and to redirect the cart again . The lever at Corn ' s position moved with the one Cathy changed , which hit Corn in the groin . When Yuma defeated Corn , he exploded into a pile of popcorn , which Cathy helped eat . After that , while Yuma Dueled Thunder Spark in the Speed Field , Cathy and the rest of the gang watched the Duel through the helicopter . When Yuma fell in the water , both Cathy and Kotori jumped from the helicopter to the water , doing " Catbingu " , in order to save him . However , he soon came back on his own , making the girls ' effort useless . After jumping into the Speed Field ' s river field in order to save Yuma , Tori and Cathy are soaked . They are inside a dark stone building , and notice a door in the opposite site of the building . It appears to be a dressing room , full of female clothes . Cathy and Kotori then borrow a dry dress for each . Tetsuo comments that the girls kept arguing the whole way to there , and that its odd how they suddenly look like friends , while Takashi complements saying that the situation shows how complicated a girl can be . Cathy and Kotori then ask Yuma if they are cute with that clothes , and start arguing about that . Seeing that the girls have a good relation , but keep arguing , Astral comments that its seems to be complicated to maintain a friendship . Takashi and Tokunosuke then notice a big door there , which they all pass by , entering a dark room , decorated with lots of creepy dolls , and featuring a big stairway leading to a Doll House . Suddenly , Cologne comes down the stairs , holding a candlestick . She welcomes them to her House of Dolls , and Astral notes she is Princess Cologne , who was known as the mascot of Heartland . They then notice she was also an enemy , and she confirms it , saying that Yuma and Astral won ' t get out of there . But when Cathy replies saying that a short like her cannot intimidate them , Cologne notices Tori and Cathy are using clothes from hers . The girls try to excuse , but Cologne doesn ' t listen to them , and enraged , throws the candlestick , which surrounds them with flames , and challenges Yuma to a Duel . When Yuma uses " Zubaba Knight " with " Shadow Clone Zone " , creating four copies of him , Cathy celebrates , but the others stare her , as she caused Cologne to rage . During the Duel , Cologne reveals about her past . Cologne was once a doll , who was bought by a rich girl . However , that rich girl soon bought a new doll , forgetting about Cologne , and abandoning her . She was then sent to the disposal plant of Heartland . There , Dr . Faker picked her up and gave her a life . And then , crying , yells that she doesn ' t want to be a miserable doll anymore . This feeling strike Yuma and the others , making Yuma hesitate about the Duel . At that time Cathy notes she was the girl who abandoned Cologne . She gets awkward and confused about what to do , but when she decides telling the truth , Kotori says that she was the one who abandoned her , and apologizes . She did this so that Cologne soothed her anger , and that Yuma could concentrate in the Duel , but Cologne knows she is lying , and gets even angrier , throwing oil in the fire surrounding them so that it gets higher , almost hitting them . When Yuma defeated Cologne , the impact of his attack threw Cologne to inside the Doll House , which was in fire . At that time , Cathy dove into the flames and tries to save her , saying that she was the one who abandoned Cologne , and had to save her . Cathy ' s noble attitude makes shocked Yuma and Kotori . In her haste , Cathy mistakenly grabbed one of Cologne ' s dolls instead of Cologne . This time , Yuma decides to go save Cologne , but , who comes out of the Doll House carrying her in his arms is Grandpa Demetto . Cologne ' s soul was supposed to leave her body , but Demetto gave her his own soul , which allowed her to keep alive . While he sends Cologne out of the fire towards Yuma , he is engulfed by the flames together with the field . Cologne mourns the death of Demetto , who she loved . As she had nowhere to go now , Yuma invites her to live with him in his house . Cologne asks him why he is doing that , and he answers saying that everybody that Duels him becomes his friend . Cologne accepts Yuma ' s invitation , becoming friends with him and the rest of the gang . Later , Yuma and the members of the Numbers Club gather in Cathy ' s house . Everyone get impressed at her mansion . Astral comments that it is much better than Yuma ' s house . Cathy then tells Yuma that if he marries her , all that would be his , and Kotori doesn ' t believe she said that and yells at her . Cathy apologies with Cologne , and tells her that she can live there if she wants to . However , she just turns around and says that she likes Yuma ' s house better , and that she prefers love to money . Tetsuo then asks Cathy what she wanted to show them . She then presses a cat paw - like button , which opens a door leading to a big room , with many researchers and big computers . Cathy explains that as an apology for the trouble she caused , the Numbers Club ' s headquarters would be established there , where they can look up mysterious phenomenons happening throughout the world , and therefore , locate the " Numbers " . While the guys get amazed on the technology and say how Cathy is really put into it , Kotori sarcastically says Cathy is letting her money do the talking , while she replies saying asking if Kotori could do that . The Numbers Club then start helping Yuma , wearing new super hero - like outfits .