He is characterized as a happy-go-lucky, adventurous, but naïve character who wears a set of goggles, a characteristic that would eventually become shared among the leaders of the various DigiDestined in Digimon. He is the older brother to Hikari "Kari" Kamiya and can be very protective of her, just as Yamato "Matt" Ishida is with Takeru "T.K." Takaishi
As a brash person, he often acts on impulse without realizing the consequences of his actions. This leads him to moments of friction and guilt between his best friend and rival Matt, his oldest friend Sora Takenouchi, as well as his Digimon partner Agumon. As a true leader, however, he manages to do whatever is necessary to rectify the situation, and in times of need, save friends and family from certain doom. He is the bearer of the Crest of Courage.
Tai is a very caring and considerate person, even if his actions may cause some people to think otherwise. Unfortunately, this caring personality is often hidden by his rash actions brought upon by that desire to help people. It takes time for him to learn how to be a leader, but he does blossom as a person to someone who knows what he has to do and will do it. He learns to look farther ahead and also to mellow out a little and not act brashly, which is exemplified by how calmly he takes in situations when mentoring the younger DigiDestined.
The adventurous leader of the group, Tai is always the first to jump into action, though it often throws him into the path of danger. His ideas often conflict to Matt's, resulting in a fight. When attending summer camp, it begins to snow and Tai, along with Yamato "Matt" Ishida, Sora Takenouchi, Koushiro "Izzy" Izumi, Mimi Tachikawa, Joe Kido, and Takeru "T.K." Takaishi, find devices, which they would later find to be called Digivices, after they come hurtling out of the sky. All seven are then swept into the Digital World.
Tai awakens to find Koromon sitting on him. Not remembering his previous encounter with a Koromon, he freaks out but eventually comes to trust Koromon, and the two become friends and partners. After meeting up with Izzy, Tai goes up a tree to get their bearings but finds that he doesn't know where they are. Joining his fellow campers, each of whom have their own partners, they are attacked by Kuwagamon and their Digimon digivolve to Rookie, his Koromon to Agumon. Their efforts, however, result in them being thrown off a cliff, though Gomamon saves them. And so it begins... When Shellmon attacks as they rest at a beach, only Agumon's attacks work as he is the only one to eat, and he isn't doing well. In order to help, Tai decides to provide a distraction. He is caught while doing so, and the rush of anger and protectiveness that Agumon feels spurs his Digivolution into the Champion form Greymon, who defeats Shellmon. The Birth of Greymon
Tai continues to lead the group on their journey, getting into fights but generally blazing the trail. After the group gets separated by Devimon, Tai manages to befriend Frigimon, who takes them to another island, where he and Agumon find Matt and Gabumon. Tai gets into an argument with Matt about their next option; Matt wants to search for the others while Tai wants to head straight to Infinity Mountain. Their words come to blows, only broken up by Mojyamon. Subzero Ice Punch!
Tai and Matt return to Primary Village in time to protect T.K., Matt's little brother, from Leomon. They subsequently defeat Devimon and are told by Gennai to head to the Server Continent. The Legend of the DigiDestined Along the way, they find the Tags to their Crests but are attacked by Etemon on the Continent itself. The DigiDestined manage to escape into a tunnel, where Tai finds his Crest of Courage. The Dark Network of Etemon This brings him arrogance, however, as well as the ambition to get Agumon to digivolve into Ultimate. His reckless measures get him into trouble by first overfeeding Agumon and then walking deliberately into trouble, knowing that danger is what causes their partners to digivolve. His actions cause Agumon to dark digivolve to SkullGreymon, who causes disaster by rampaging around and taking out Garurumon, Birdramon and Kabuterimon before regressing into an exhausted Koromon. The Arrival of SkullGreymon As a result, both of them lose their confidence until Piximon arrives and forces them to face their doubts. Tai is reminded of the time when he tried to learn how to ride a bike, and realizes that despite all the hardship, all of the pain, he needs to come back after suffering defeat. The Piximon Cometh
Returning to his cocky attitude, this is only bolstered when Izzy announces that they are in the Digital World, possibly leaving their bodies behind. Due to this, Tai throws caution to the wind and acts as reckless as he did before, believing that he can't really be harmed. Right before he walks through an electrified fence, Izzy snaps him out of it, telling him that dying in the Digital World still means real death and causing Tai to suddenly start to fear. His hesitation costs him; Etemon attacks and prevents him from rescuing Sora and Biyomon, held captive by Datamon. The Prisoner of the Pyramid When the DigiDestined mount another assault on Etemon's base to rescue Sora, however, Tai learns to get over his fears, to walk forward anyway in the face of danger to save his friend, and in doing so truly learns what Courage is about. He successfully manages to save Sora and when faced with Etemon fused with his Dark Network, Tai walks forward with Greymon at his side to fight. His unflinching courage causes his Crest to shine and lets Greymon digivolve to MetalGreymon. MetalGreymon defeats Etemon, but Etemon's massive energy causes a dimensional rift to open, which Tai and MetalGreymon are sucked into. The Earthquake of MetalGreymon
The warp leads back to the Real World. Tai returns home and relaxes for a bit while taking care of Kari, but he realizes that not only has little time passed but also that his friends haven't returned. Digimon then begin appear, though only he and his sister can see them. He receives a message from Izzy, who warns him not to come back to the Digital World, but Tai knows that he must get back to fix the balance. When Tai sees an Ogremon, Koromon digivolves into Agumon and a dimensional warp opens. Agumon knows he must return, and Tai, torn between his sister and his duty, tells Kari that he must go despite Kari's pleas. He willingly enters the rift back to the Digital World. Home Away From Home
Upon his re-entry, Tai finds the group in severe disarray. Time moves much quicker, and months have passed in the Digital World though only hours have in the Real World. The entire team has broken up, mainly to look for him, and are moving their separate ways. Tai first locates T.K., who has been left alone by the rest of the group, and manages to convince him to reconcile with his partner, Patamon, rather than be manipulated by DemiDevimon. Forget About It! With T.K. and their partners, Tai leads them to a diner, where they find Matt and Joe, rescuing them from Digitamamon. WereGarurumon's Diner He joins Joe in looking and finds Mimi, managing to convince her to leave her princess life with the Otamamon and Gekomon. Princess Karaoke
By now, Myotismon has emerged as the next great threat, and he is in search of the eighth DigiDestined child. The DigiDestined pursue him to the Real World through Myotismon's special gate. Though Myotismon uses a spell, Izzy manages to use his knowledge of Digimon as well as of the ten cards Gennai gives them to figure out which of the nine slots eight of the cards should go. At the last moment, Tai chooses the correct card by sheer luck, and they return to the Real World. It's All In The Cards Throughout this time, Tai manages to hide Agumon from his family, though when Gatomon, at first an enemy, reveals that she is Kari's partner, and that Kari is the eighth DigiDestined they've been searching for, Tai is shocked. The Eighth Child Revealed When Gatomon is captured and Myotismon stages an all out attack to round up all the children to force Gatomon to find her partner, he and Greymon whisk Kari to safety, though he is unable to save his parents. Entrusting Kari to Matt, Tai attempts to rescue the trapped citizens, though he only manages to make it in time to regroup with the DigiDestined in a final assault on Myotismon. Flower Power
After Myotismon is first defeated due to Wizardmon's sacrifice, Myotismon instead digivolves to VenomMyotismon. The Digidestined believe that the key to defeating VenomMyotismon is to have Angemon and Angewomon shoot Tai and Matt with arrows of hope and light. Prophecy Both of them agree, and Agumon and Gabumon warp digivolve into WarGreymon and MetalGarurumon, Mega Digimon who, with help, manage to defeat VenomMyotismon. Prophecy Thinking that it is finally over, the DigiDestined are shocked to see the Digital World appear in the sky. Though they are finally home, the DigiDestined decide to go back to protect both worlds they love. All eight of them open another warp and go back to the Digital World to restore the balance. The Battle for Earth
The Dark Masters emerge as the major enemy, and it is revealed that they were the ones who warped and rebuilt the Digital World. Tai believes that they are strong, but each of the Dark Masters prove themselves even stronger, with their leader, Piedmon, effortlessly defeating WarGreymon and MetalGarurumon. As Piximon whisks them to safety, he tells them that they must become strong, right before he sacrifices himself to buy them time to flee. Enter The Dark Masters Tai takes this to mean that they must become physically strong, and he orders the group to defeat a Shellmon, whom they previously needed to digivolve to beat. Sea-Sick and Tired In his quest for strength, he loses sight of his friends, and when Whamon sacrifices himself to allow WarGreymon to defeat the Dark Master MetalSeadramon, Tai doesn't allow himself to mourn, preferring instead to move forward. Playing Games His actions strain Matt's trust in him, and Matt's doubts allow Cherrymon to successfully play on his fears and turn Matt against him. It culminates in Tai and Matt getting into a fistfight, as their Digimon clash in the skies. Their battle ultimately causes a rift in the friends. Matt leaves to reevaluate his place in the group, while Mimi can't deal with the drama and the fighting and strikes off on her own, while Joe goes with her to make sure she is safe. The Ultimate Clash
While split, Kari falls ill, and Tai frantically searches for a cure for his sister. Leaving Kari in Sora and T.K.'s care, he heads to a city with Izzy, not knowing that it is the Dark Master Machinedramon's domain. When they are thwarted time and time against by Machinedramon, Tai grows ever more impatient and finally snaps at Izzy. He then calms down and recounts a time when he forced a sick Kari to play outside with him, worsening her sickness and causing his mother to reprimand him. Realizing that panic would not help, Tai instead focuses on doing right. My Sister's Keeper
After defeating Machinedramon and about to fight Piedmon, Tai, with all of his personal growth in the series, acts with true knowledge of a leader. While looking at the big picture, he refuses to let Agumon digivolve to WarGreymon to fight Piedmon's bodyguard LadyDevimon, instead allowing MegaKabuterimon and Angewomon take care of it while stating that Agumon needs to save his strength for Piedmon. He also sends Sora and T.K. to look for Matt, knowing that the presence of all the DigiDestined would be needed for the final battle. Joe's Battle Tai and WarGreymon manage to hold the line against Piedmon until Matt returns, and the two reconcile, with Matt's Crest of Friendship healing WarGreymon's wounds. The Crest of Friendship Unfortunately, Piedmon proves to be too strong and captures him, Matt, and their partners by turning them into keychains. MagnaAngemon, Patamon's Ultimate form, saves them, and they manage to defeat Piedmon, only for Apocalymon to appear.
Apocalymon turns out to be a formidable foe, destroying their Crests and managing to turn them into free-floating data. With encouragement from their partners, however, Tai remembers the incredible odds they overcame and the strength within them, and he finds that the power of Courage lies within him. Now Apocalymon It gives him the strength to return to normal and lead the charge against Apocalymon, who they manage to defeat after finding their conviction.
Unfortunately, the solar eclipse marks the rebirth of the Digital World. In the English version, it is thought that the gate would never reopen, stranding the DigiDestined in the Digital World, while the Japanese version has the reasoning that the Digital World might see them as foreign elements as it tries to recover and might delete them. Either way, the DigiDestined must leave their partners. Tai and Agumon reminisce at the spot where they fought Seadramon, joking and ribbing at each other. The Fate of Two Worlds
the digidestind and their digimon now are worshiped by jungle people in an uncharted of the digital realm, at some point, they encountered Sam, Max, and a few others and ever since, then lead to a new found partnership to the shell louge squad.