Hatsu/History

Evankhell's Hell
Hatsu appeared on the Second Floor with all the other Regulars. He encountered Anak and began to fight her. Ship Leesoo then turned up, but both Hatsu and Anak completely ignored him. Subsequently, it was announced that the Regulars had to form teams of three, and Hatsu and Anak stopped fighting immediately and teamed up. They continued to ignore Ship, but as he grabbed them they ended up on a team with him.

Yu Han Sung's Examination
Hatsu then passed the barrier and the Door Test without much trouble owing to Leesoo's high intellect. Ironically, he and Anak were almost disqualified when Leesoo had trouble getting through Lero-Ro's barrier.

Crown Game
He took part in the Crown Game with Anak and Ship. He was able to defeat most of the Regulars who attacked him. However, Phonsekal Laure blasted him away with his Shinsoo. After Anak defeated Laure and made a bet with Baam, Hatsu watched the rest of the Crown Game in a moody fashion. At the end, when Anak was about to attack Androssi, he stopped her reminding her of her team. He received an icy response.

Position Test
Hatsu was put in the Scout position for training. During the lessons, he tried to get Koon on his "friends" list. At first, they hated each other, but Baam helped to cool down the tension between them and he became Koon's friend.

Hide and Seek
He was put on Team B for the Hide and Seek test. He travelled with the Spear Bearers on the team, both of whom were very annoyed until Hatsu beat them up. He sensed Quant's ominous presence approaching by using his Shinsoo and told the Spear Bearers to run and throw spears from a distance. Hatsu sensed that Quant was very angry, making the Ranker even more dangerous. He drew his swords and prepared for the coming onslaught. When a Lighthouse revealed Quant, Hatsu blocked his attack and began to fight him. He noticed that while Quant's moves were possible for a regular human, they had been honed to a level that was beyond human capability and into the being that was a Ranker. He decided that he to finish the battle while Quant was still toying with him and leapt into the shadows. He came out at high speed attacking Quant, but the Ranker simply grabbed him in midair and slammed him into the wall. However, Hatsu was able to remain conscious and grabbed Quant's hand, saying that he would not let go, and telling Parakewl and Mauchi to fire, not knowing that they had fled.

Final Examination
In the discussion the Regulars had after Baam revealed himself as an Irregular, he was the first to speak of Baam in a positive manner. When Koon acted like he was abandoning Baam for being an Irregular, Hatsu became enraged and was about to attack him, calling him a coward.

In the Submerged Fish Test, Hatsu plays a minor role of watching the thieves' movements. After the test, he became annoyed with Parakewl who was only concerned about whether they had passed or not since this went against the code of honour he had been raised to. When Parakewl mentioned that Baam was dead and kept using the word dead, Hatsu threatened to kill him. He felt obligated to Baam and influenced everyone to help Rachel climb to the top of The Tower.

Tower of God: Part 2 - The Return of the Prince
Hatsu is now a great and powerful swordsman in Part II, recognized throughout The Tower for his skill. He is rumored to have fought the "Devil of the Right Arm" during the timeskip. Though he was strong, neither of his swords could pierce Beniamino Cassano's arm and the result was a crushing defeat. One of his swords may have shattered, as we only see him carrying one in the second part. Afterwards, he trained relentlessly to strengthen his sword to be able to pierce Cassano's arm.

Bet
As The Hand of Arlen was blown up, he along with the rest of his team watched the news grimly, believing the reports of Koon's death. When the invitation to the Workshop Battle was sent to Ship's pocket, he wordlessly followed Leesoo to the next Floor.

Workshop Battle
When they arrived at the 30th Floor, Leesoo was goggling at the enormity of Archimedes, annoying the highly introverted swordsman. He mock-swung his sword at Leesoo, sobering the atmosphere by reminding them of the mission: to kill Jyu Viole Grace.

One Shot, One Opportunity
He, Leesoo and Anak were running towards the centre of the city where there would be bullets when they ran into Androssi, who had captured Regular paparazzi for their bullets. He lashed out at them when they started randomly supporting FUG instead. After hearing from them about FUG's location, Leesoo deliberately decides that, because of their excess amount of bullets to use to get to Archimedes, to ignore the current game and focus solely on attacking FUG.

Once there, they decide to stay hidden and wait till the tickets given is down to 100. Once the tickets finally reach 100, Hatsu launched an attack on Cassano immediately, although this only served as a warning. With that, the two clash for a few moments. As the two back off from each other, Cassano reminds Hatsu of how the latter was unable to even scar him and his weapon once in their previous battle and that Hatsu lost horribly. But, in response, Hatsu tells Cassano to check his arm if what he says is true. On doing so, Cassano was shocked to see his arm filled with several cuts done in by Hatsu's sword. Thinking Hatsu used some kind of trick, Hatsu explains that the one who trained harder is the one that will win the second clash, describing how he swung his sword billions of times to never lose again. He then thanks Cassano for helping him and his sword grow stronger and proceeds to use Spectral Dance to inflict deep cuts on Cassano.

After a series of clashes, it is later shown with Cassano done in by Spectral Dance. But still conscious, Cassano then explains that he is jealous of Hatsu, of how people like him can grow stronger with not just body, but with the weapon they hold themselves. Suddenly, Cassano emerges and gives a massive clash to Hatsu. Though Hatsu is able to guard it with his sword, it is revealed that Hatsu's sword has broken in half. Following the catastrophe, Cassano then farewells him until they meet at the Workshop Battle and a loud bullet shot is heard.

Archimedes
It is later revealed that Hatsu made it, presumably meaning Cassano shot Hatsu with the Holy Bullet to go up to Archimedes. Throughout the day, Hatsu is irritated that his sword had been broken. Later, Leesoo tells Hatsu to use Emile to find a shop that sells fresh swords. Though Hatsu was reluctant at first, Leesoo tells Hatsu that at times like this, he needs to let his broken sword go, and that he needs to move on from it.

Listening to Leesoo, he uses Emile for the first time, which leads him to the Acorn Workshop. Confused of the name of the store, he wonders if the place actually sells the "sword that can cut devils". Once at the door, he tries to ring the bell several times, but to no avail. He looks back, and sees Cassano and Horyang approaching the Acorn Workshop as well. Hiding, he witnesses the two enter the door, much to Hatsu's surprise, as he could not do so. Before the door closes, Hatsu goes incognito and gets inside the shop. Quietly following them, he peaks at the room the latter two enter, and witnesses Horyang and Professor Sophia's reunion. Confused about how those two have some kind of connection with a Professor, someone from behind interrupts his eavesdropping.

Hatsu turns around and by instinct "gets his sword ready", only to realize he has no sword. Beta then asks if he is here to "play" with him and if it is fun to eavesdrop. At that moment, clear increments of Shinsoo sparks begin to arise from Beta's body. Right after, though, Cassano and Horyang leave the room and catch Hatsu red-handed. Hatsu, realizing his situation, is later seen wrists tied and thrown into a room. He demands Cassano to let him go and questions on what is happening. Cassano only responds by saying that they will lock him up only till after the Workshop Battle. He then locks him in the room.

Battle x Gamble
He unties the ropes, remarking how bad Cassano at tying others up is. Left with no other choice than to rely on Emile once again, he asks about a way to escape from the cell with her advising him to look under the bed, where a hidden passage is located. Hatsu realizes that the passage leads to a wide area due to the flow of Shinsoo and wonders where Emile might be sending him.

The Truth
Hatsu continues with his escape plan. He ends up in a wide area where he encounters a door. As he's approaching it, a Workshop patrol appears and attacks him. After a short struggle the determined Hatsu manages to paralyze it by using a steel pipe reinforced with Shinsoo, what initiates the self-destruct sequence. In the end he's saved by Lero-Ro who destroys the patrol with a single strike. Lero-Ro then asks for Hatsu's help, telling him that they were going to prevent the creation of the most terrible weapon.

Thorn
From the bushes, Hatsu appears, calling out to Leesoo. He frantically tells Leesoo that they need to stop the creation of the most terrible weapon because Baam was in danger.

When Leesoo encounters Koon, Hatsu appears behind Koon with a gun pointed at his back and tells him that they know everything. Koon wonders how they know Baam is alive, with Hatsu revealing that it was Lero-Ro that gave him the information as well as being on Archimedes. Koon is surprised to hear that Lero-Ro is on the ship. Hatsu then explains why Lero-Ro was on the Archimedes and what he had discovered as a result of his investigation, much to Koon's horror.

Hatsu tells the others the same things he told Koon, shocking them all at the news. Rak frustratedly demanded to know why Hatsu withheld such information if he knew; Hatsu merely replies that he couldn't do anything at the time. This was actually due to FUG monitoring all of Baam's friends closely.

With the information Lero-Ro told Hatsu, he is able to help Koon finalise the details of his plan to summon Viole. Later on in the tournament, as the team prepares to carry out Koon's plan, Hatsu is seen sharing a Lighthouse(?) with Leesoo.

When Beta first appears, Hatsu recognises him as the one who led Viole into a trap.

Closure
When the Workshop guards attempt to eliminate Beta, Hatsu helps out in subduing them. He then stands with everyone present as Koon, Rak and Baam are reunited, with Leesoo noting that the strongest team was back.

When the group splits up to retrieve the three hostages, Hatsu teleports with Androssi to Varagarv and Ron Mei's location. Hatsu reminds her that they only need to stall for time and then calls out in worry as she launches herself at Ron Mei. After witnessing Varagarv damage Androssi, Hatsu uses BongBong to teleport her out of danger. He then reasons that Varagarv may well be the most difficult opponent Androssi faced. After Hatsu takes everything into consideration, he tells Androssi that they would be attacking instead and he would cover her using his new sword, a metal pipe. The two launch themselves into attack with Hatsu dissipating Varagarv's Shadow Wolves, enabling Androssi to teleport both herself and the Mad Dog high into the sky.

Hatsu/Historia