Hart Tenjo Hart Tenjo , known as Haruto Tenjo ( 天城ハルト , " Tenjō Haruto " ) in the Japanese version , is Kite Tenjo ' s younger brother and younger son of Dr . Faker . He possesses abilities from the Barian World , that Dr . Faker abuses in order to accomplish his plan of destroying the Astral World , and collecting the " Number " cards . He holds a strong connection to Yuma Tsukumo and Astral . Design . Personality . While under the influence of Vector ' s Barian powers , Hart suffers from a split personality : that of a sadistic nature with a desire to destroy the Astral World , as seen when he ' s laughing at its inhabitants ' suffering , saying that he " needs more screams " ( in the dub he says he needs more energy ) , as that is what comforts him . When he ' s not using his powers , he tends to act quite vulnerable , usually staying in bed , or looking down at Heartland City from the Heartland Tower , wondering why he cannot enjoy laughter like the people who attend the Heartland Fairground . Before Hart went to live in Heartland and after he got better he was a regular kid , who loved to play and have fun . He has a very kind personality and is always trying to look out for others , especially Kite . In the anime Kite states that Hart has not been his usual self as in the past , as he used to enjoy laughter and was playful and talkative and was very kind . During the Duel when Dr . Faker is possessed by Vector , he was shown to deeply care for Kite and Yuma , as he could not bear to see them in pain and shedding tears . After the Duel with Vector , Hart was fully rid of the Barian ' s influence ( with the blank stare and bags under his eyes gone ) and his personality reverted to the way it was in the past . Abilities . Hart possesses Barian powers that can create paths to alternate realities and teleport himself to another location , especially when he is worried with his brother . Also , he is able to transfer his power to others , like he did with Kaito , in the form of Neo Galaxy - Eyes Photon Dragon . Moreover , his powers allows him to see Astral and even hear him . Hart drained his powers to emancipate Astral from the Sphere Field Cannon . Etymology . Although he is fragile , his dub name is the German word for " tough " or " strong " . Anime biography . History . Hart was born very frail and sickly , and due to this , his father , Dr . Faker went to great lengths to save him . He eventually made a deal with Vector of the Barian World , who sustained Hart ' s life in exchange for Faker finding a way to collect the Numbers and destroy the Astral World . In the past , Hart lived with his brother Kite and Orbital 7 in a small , wooden villa where they would play all day whilst Hart drank his favorite drink , hot chocolate . This happy life was however , disrupted due to the presence of Hart ' s " Dark Energy " . Mr . Heartland appeared before Hart and his brother , and told Kite that Hart ' s powers are useful for the world and that Hart must go with him per Dr . Faker ' s orders . Some time later , Hart was visited by his brother at Heartland Tower , but he couldn ' t remember Kite . Angered , Kite demanded from Mr . Heartland to know what he had done to his brother . The latter answered him Hart is able to communicate with the spirits of the Astral World . In order to save their own world , they must destroy the Astral World , and Hart had been chosen for that purpose . As Hart ' s soul had already left , the only way to heal Hart is the gathering of one hundred " Number " cards . Upon hearing that , Kite agreed to become a Numbers Hunter . During one night at Heartland , Kite tried to escape with Hart . As they were hiding from Heartland Police , Kite gave him his favorite candy , a piece of caramel to cheer him up . However , they were found soon . Kite was subdued , while Hart was taken away from him . Seeing his brother being restrained , Hart used his powers to knock the police who were guiding him off of the tower . But they were both captured once more . Yu - Gi - Oh ! ZEXAL . Pre - WDC . After hunting the " Number s " of an unlucky Duelist and informing Mr . Heartland about his capture , Kite returned to Heartland Tower in order to check up on Hart . He found Hart stood at the window of the tower , staring blankly down at the people enjoying the Heartland Fairground and asks Kite why they are laughing as he doesn ' t require laughter , only screams . This Kite displeased , but Hart asked if he ' s normal , with Kite responding that he is simply in a bad dream and that he will one day wake him up from it . During Kite ' s Duel with Yuma Tsukumo , Hart was ordered to send the trash collected by the litterbot s into the Astral World again . This caused him intense pain and he collapsed , calling to his brother . Orbital 7 monitors Hart ' s situation and informs Kite , causing him to cancel his Duel with Yuma in order to run to his brother ' s aid , saving Yuma and Astral from not only losing their " Numbers " , but also their lives . After his trauma , Hart spent a number of days in bed . To keep Hart relaxed , Kite stays at his bedside , making sure that he is comfortable in every aspect , even to the extent that he has a holographic scenery of their old house surround Hart ' s room . Despite being ill , Mr . Heartland interrupted and stated that Hart must use his powers . Despite Kite ' s protests , Hart said that he will use his powers as they are causing good for the world , which surprised Kite . Hart then left with Mr . Heartland , who tells Kite to continue collecting the " Numbers " if he wants to save Hart in time , and the two then disappear through a portal . Some time later , Hart was seen sleeping with Kite watching over him . World Duel Carnival . Later on , Hart sees Kite exhausted from collecting the " Numbers " to heal him , and after blowing part of his room , snuck away from the Heartland Tower . Whilst walking around Heartland City , Hart meets Yuma , Astral and Tori . Hart revealed that he can see Astral , who in turn wants to know more about him . Moved by Astral ' s wish , Yuma took him to his home , but in the way , they find Dextra and Nistro , who were searching for him . Hart then created a wave of energy and fled with Yuma and Tori . After Yuma agreed to take him to Kite , a helicopter ( which was in fact piloted by Quinton ) was about to land . As a result , Hart unleashed his dark energy , but Yuma calms him down with a caramel . Quinton then came out and uses his crest to take control of Hart , whom goes on the helicopter with him , and they leave . Yuma and Kite then joined forces to go rescue him , breaking into an abandoned Gallery , where they met and confronted Quattro and Trey . While the four Duel , Vetrix began a ritual to extract Hart ' s powers . While Kite is fighting , at the moment where he ' s about to lose , Hart resonated with his brother and , bearing in mind that Kite has always been there for him to protect him , Hart decides to fight to protect his own brother as well . As a result , Hart ' s remaining power was transferred to Kite , allowing him to Xyz Summon " Neo Galaxy - Eyes Photon Dragon " , forcing the ritual to end , and leaving Vetrix with the rest of his power and memories . Hart had then been left in critical condition , and was rushed to the hospital . World Duel Carnival Finals . While looking for his Deck , Yuma and Astral found Hart resting on top of the Heartland Tower . Due to his condition and known situation , Yuma cried for Hart only for him and Astral to be transported into a vision where they meet with Hart in the villa he lived in . In his consciousness , Hart said he knew they would come , and requested Yuma and Astral to save his brother . During Kite ' s Duel with Vetrix , when Vetrix revealed Hart ' s face under the mask , he is shown on the big screen , still unconscious . Even so , he squirms in pain when Vetrix pinches his cheek , as the ritual had connected him to Vetrix . . Yuma and Orbital 7 rushed to Heartland Tower to save him , as Vetrix hacked the system and locked the door , preventing Faker ' s guards from getting in . Yuma and Astral entered Hart ' s consciousnesses again , where they met Vetrix , who took the form of a shadowy dragon . Yuma slew it with " " , severing Hart ' s connection to Vetrix and allowing Kite to continue the Duel , but Kite ultimately lost . When Vetrix attacked again , Hart appeared and protected him with an energy field , though Kite still fell comatose after losing his " Numbers " . When Vetrix released all the souls of his victims , Hart is shown to be waking up from his coma along with Kite . However , Dr . Faker took Hart and used him to power the Sphere Field Cannon . Kite teamed up with Yuma and Shark and attempted to defeat Faker and save Hart . Faker eventually revealed the truth of his deal with Vector , saying that Hart would not have survived up to that point without the power of the Barian World . Hart managed to use his powers to free Astral from the Sphere Field , letting him merge with Yuma and win the Duel , saving Faker from Vector ' s possession . After Fakers defeat , he alongside his father watched the Duel between Yuma and Kite . Yu - Gi - Oh ! ZEXAL II . After hearing that Yuma was hospitalized , Hart admonished Kite about visiting Yuma in the hospital instead of looking over data about Mizar . When Kite seemed to ignored him , he decided to go on his own until Orbital 7 warned Kite on how it was time to visit Yuma like he planned too , causing Hart to smile . On the night before Kite goes to the Barian World to help Yuma , Kite informed Hart of his mission , causing Hart apologized and blamed himself for causing Kite to go on a dangerous mission on his behalf . However , Kite insisted he going of his own choice and promised Hart that he will to return soon . During the Barian s ' invasion of Earth , Dr . Faker and Hart watched Kite ' s and Mizar ' s Duel on the moon from their laboratory . As Kite was about to die , he comforted his saddened family by saying he had no regrets and told Hart to care of their father before the screens blacked out . After the fusion of the Barian World and Earth continued , Faker and Hart used Heartland Tower to house survivors who did not obtain a " Fake Number " and get sacrificed to the Barian World . As most of the people started to lose hope , Hart urged not to because Yuma was fighting for them . After Nash was defeated by Yuma and saved the Earth , Hart went with Caswell Francis , Cathy Katherine , and Lillybot to congratulation Yuma ' s success . However , Yuma regretfully informed to Hart that he couldn ' t saved Kite . Some time after Yuma ' s and Astral ' s Duel , Hart started assisting with his father , Vetrix , Quinton and a revived Kite to research parallel worlds . Manga biography . In the manga , just like in the anime , Haruto lived with Kaito , when Mr . Heartland took him away by force . Now , Dr . Faker uses Haruto in order to fulfill his goal of destroying the Astral World . Relationships . Kite Tenjo . Kite loves his little brother Hart very much and he claims Hart is " everything " to him . In their childhood , Kite and Hart lived together mostly by themselves and would play every day , from catching butterflies to playing hide - and - seek . Kite would do anything it took to protect Hart , even at the cost of his own life , pushing himself to hunt " Numbers " on his own and disregarding the dangers of his Photon Transformation . Whenever Hart was in danger or pain , Kite underwent great panic and stress , to the point of not thinking clearly as his anger and worries took over . While Kite is normally cold and detached from others , Hart brings out Kite ' s gentle and caring side . Since Hart ' s " sickness " took a toll on him , Kite often tried to make him feel better , usually having limited success . Kite also tried to spare Hart from being concerned about him , putting on a forced smile and assuring him that he ' s alright . Although he goes along with Kite ' s words , Hart can see through him and understands what Kite was doing for him . If he was able to , Hart would try to protect Kite as best as he can within his powers . Yuma Tsukumo . Having seen Hart ' s picture before , Yuma first met Hart by seeing him walking in the middle of a busy street and recognized him as Kite ' s brother . When an upcoming truck was about to run Hart over , Yuma tried to protect him . After Hart had blown a huge hole in the truck , Yuma kindly let Hart come home with them and let him stay for the night . Yuma was also happy when Hart finally started to eat something and enjoyed his time at dinner . At night , Yuma let Hart sleep in his hammock and covered him with a blanket . While Hart was having a power surge , Yuma ran into the explosion and hugged Hart , telling him " you ' re not alone " and promised to bring him to his brother . Also , Yuma helped Kite rescue Hart from the Vetrix Family , and showed great concern when Hart was found unconscious . Yuma seems to have grown close to Hart ; while speaking to him in his mind , Hart asked Yuma and Astral to save his brother , Kite . When Vetrix used his connection to Hart to hurt Kite , Yuma rushed to Heartland Tower to save him and severed his link to Vetrix . Likewise , Hart also cares deeply about Yuma as he is always doing things for his sake . Hart is also grateful towards Yuma for helping his brother overcome his guilt . When Hart heard that Yuma was injured , Hart was very concerned about him and wanted to visit him at the hospital , even wanting to see Yuma on his own if Kite didn ' t go with him .