Boro

Boro (보로, Boro) is a D-rank Fisherman and an experienced level Shinsoo Martial Artist who managed to hold onto his Express Ticket till now. He has two Shinsoo Martial Arts apprentices in Hanool Kang and Felix. He seems to be interested in Jyu Viole Grace unaware that his current ally, Baam is the same person. After the event at the Last Station, he and Sachi departs from Team Baam and goes their own way.

History
Boro had already boarded the Hell Express twice in the past. On his first boarding of the Hell Express, Boro encountered FUG by getting on the same train as an unknown Slayer candidate and, thanks to him, Boro had suffered some horrible experiences: little by little, the Slayer candidate killed everyone on the Hell Express until, in the end, there were only five survivors including Boro. The other four were incredibly strong but one ended up dying and the rest forfeited the train. During these previous experiences on the Hell Express, Aka Williams, Daniel Hatchid, Sachi and Roen Yuia were his teammates.

Appearance and Personality
Boro has silver-colored wavy hair, has a small scar on the bottom left side of his chin, wears a brownish black shirt with black pants and is fair skinned.

He is a level-headed and fairly modest guy. Due to his past experiences, he is quite perceptive of the people he encounters.

Hoaqin
Boro appeared with Hong Danhwa and Hanool Kang on the 37th Floor. Danhwa asked him if the story he told them was true, with Hanool piping up too, and Boro replied that Hoaqin was the epitome of 'evil' before then revealing the events that happened 600 years ago on his first time on the Hell Express.

Wooden Horse
During the day, Boro and the company finally arrived at the Wooden Horse station and soon entered inside. At 10:30 PM, with just thirty minutes for the Hell Train to arrive at the station, Boro discussed with Koon, via Pocket, if his party would arrive on time to catch up with the train. At the end of the conversation, Aka arrived along with an old partner that stated the train had arrived at the Wooden Horse.

At the 'Altar' Boro, Aka and Sachi witnessed Hoaqin coming out of the train with Boro noting that he looked smaller than last time. Boro then watched in dismay as Hoaqin effortlessly decimated a large amount of the Regulars at the station.

Later, with only 10 minutes left to board the train, Boro and the company raced towards the stairs of the train but caught the attention of Hoaqin on the way. With freak lightning interrupting Hoaqin's assault, Baam, Koon, and Rak swiftly arrived on the stairs leading into the train. A brief scuffle broke out between the two sides but it was interrupted when they were all teleported to the train conductor's office. He introduced himself and then informed them about a game that would decide who would become the Slayer candidate in a month's time. At that, he teleported them away to different locations on the train.

A Month
Their group immediately encountered the guardian Yokim and they planned on taking him down until Hwa Ryun suggested that from that point onwards, Baam was to take all tests by himself in order to prepare for challenging Hoaqin. Boro then watched as Baam took on Yokim and discussed with Sachi about Baam's lack of killing intent; Baam eventually defeated Yokim and they passed the stage.

During their traversing of the train's pathways, the group eventually encountered the "god" of guardians. Boro and Sachi suggested turning back due to the guardian's fearsome reputation and power, but Baam adamantly decided to stay and challenge the "god" of guardians. At that, the guardian snatched Baam up and took him away. Boro and the others then waited for three weeks for Baam to return.

Eventually, Baam hurriedly returned and the group narrowly made it to the 4th stage in time.

The Dallar Show
Boro and the others listened to the rules of the Dallar Show and then watched as Koon coolly won the first round. During the second round game, "Transferring the sweetfish", Boro was partnered with Aka and Sachi.

Yuri Jahad
Boro, like everyone else, is shocked to see Yuri on board the Train. After a break, he is seen helping others to pass the substitute test.

The 'Name Hunt' Station
Boro is present at the meeting with Hwa Ryun, shocked at Baam and his team preparing to go to the Floor of Death. He decides to go with Sachi since Hoaqin will be there as well, and accompanies Baam to the Name Hunt Station in preparation. He is not named one of Viole's sidekicks by Xia Xia. When Arie Inieta begins to fight with Rak, Boro tries to stop Danhwa and Yeon from rushing over but fails. He and Sachi follow Hwa Ryun around the battle with the no-named. He arrives at the scene of their battle only to find everyone missing, and hears from Red Greymon that they're being prepared for the auction.

Upon the announcement of the auction, Boro sneaks into the floating island with Hwa Ryun, Sachi, and Novick to find and secure the hostages. They find one of the ten bosses, J.M, and quickly fight with him before watching Sachi fight Lulu and successfully finding the hostages. After resting, during Karaka and Yuri's fight outside the station, Boro and Sachi run with most of the regulars and successfully board the Hell Train once again, showing concern when Danhwa, Yihwa, and Rak did not return with Baam and Androssi.

Wangnan
Boro presses a buzzer to complete a very difficult train test for Baam's team. He, Baam and Aguero discuss their lack of manpower now that they're near the Floor of Death, and they wonder what happens to Wangnan's team. Hwa Ryun tells them not to be concerned about it. On the 40th floor, he and Sachi discuss the weather and what Evan could be teaching Aguero. He asks Sachi if there are any reinforcements, and Sachi tells him about Hockney. They introduce themselves to him at the station and bring him on board. Boro also learns about Hockney's painting, the Red Light. Two months later, on Floor 42, He, Sachi, and Bero Bero encounter Miseng and Cassano. He is shocked that Miseng wants to let Cassano pass through but reluctantly obliges, noting Miseng's maturity with Sachi. After passing the Floor 42 test, he praises Hockney's skills.

The Floor of Death
After Hockney refuses Sachi's offer to return to the Floor of Death, he is shocked to discover that Hockney used to live there, and startled when hearing about the Gatekeepers that guard the entrance. As he and Sachi discuss the implications of these revelations, Boro believes Rachel might be trying to use Hockney. Aguero, however, interrupts their conversation to make sure they're prepared to enter the floor.

At the entrance to the floor of death, Aguero tells Boro to jump off first into the floor, and the rest will follow if he survives. Boro is reluctant, but Hockney tells him that it's safe. Boro introduces Hockney to Koon and Baam, but wonders why Hockney is now going with them, to which Hockney replies he can find his painting there according to Emile. Boro, still scared, floats down on Aguero's lighthouse with Sachi until Sachi kicks him off and he dives into the pool of blood. Boro watches Baam and Hockney get swept up in the current and is separated from them, but he safely lands into the floor proper with the rest of the party. Hwa Ryun, however, also disappeared, causing a great deal of shock to him.

When he and his teammates face the Gatekeeper, he is impressed they could defeat it so quickly, saying it wasn't as bad as he thought despite being wary of it before. When the gatekeeper proves to be alive and they continue to fight it, however, he is impressed by Aguero's new lighthouse ability, aided by Beta's power. Aguero asks Boro to stand still and hold his needle out. Boro obliges, and Koon finishes the gatekeeper off by teleporting it using Mystery Sphere: Red Crystal to trick it into flying into Boro's needle.

When the second gatekeeper appears, Boro and the team are led down a hidden path to Gallstone Village by Ai, another Red Witch sent by Hwa Ryun. They reunite with her, and she explains to the party that she wants revenge on Hell Joe, sneaking into his castle with Aguero, Hwa Ryun, Androssi, and Irure as Yuri ignites her 13 Months as a distraction to rescue Grand de Sah. He hears Hwa Ryun's real objective is to get the ladle, and when Grand de Lee hears this and turns on the group, he runs away with his team only to meet Rachel as well.

After her defeat, Boro puts up his guard to defend against de Lee, but Beta ignites and rescues them, taking them to Hwa Ryun. Afterward, he reunites with Baam and stays behind to look after Rachel. When Baam brings Gustang, Boro puts his guard up, but is quickly pacified. Urek soon transports him and the other regulars back onto the Hell Train.

New Power
Aguero approaches Boro and Sachi to tell them about the plan to enter the Hidden Floor, though he does so cryptically to avoid having either lose their memories. Boro angers due to not understanding the hint, but later accompanies Sachi, Bero Bero, and Irure with the rest of the party. They are all sucked into the Hidden Floor when the Master Key activates.

The Hidden Floor
Boro and Sachi appear in the town to meet Aguero, Hockney, and Rak dressed in coloquial garments. He welcomes Rak back, but Rak is apprehensive towards him. They inform Aguero that the village head, Dee, asked them to save the town and complete the quests but they refused. Aguero, however, enlists their help in completing the quests himself. In a nearby field, Boro helps defeat the plant monsters as part of the first quest, though he questions why they have to go through the trouble.

Back in the town, Boro is surprised at seeing the next quest's villain, a giant octopus, and is underwhelmed to learn its name is Octopus Kim. He begins to get overwhelmed by its power but rides Sachi's vines with Aguero up to the top of one of the buildings. Aguero explains to Boro that they can use his reel inventory to ensnare and catch the octopus. Boro ties down the fishing lines, but the octopus proves too fast to be tied down, and Sachi saves the group with his vines.

When the Big Breeder greets them, Boro is agitated that he has to listen to a song from the villagers instead of truly rest. Boro asks why the Big Breeder gave them a weak champion villain and finds out that it was atonement for making Octopus Kim too hard. Boro wants to defeat it, but Aguero is too suspicious to attack. As the Big Breeder summons the true villain of the level, Hockney drags Boro out of the way to safety. The group begins to fight the real villain, but it disappears with the Big Breeder before they can defeat it.

The Hidden Hidden Floor
Boro and Sachi waited outside the town during Baam's meeting with Hansung Yu when giant rats appeared before them as part of the true grand quest, defeating them easily. Boro then summarizes the events thus far, including the fact that he's been to the floor before, but truly understands none of it.

Koon Eduan
When discussing their strategy for progressing, Hansung declares that Boro, Sachi, and Hockney will go to meet Koon Eduan and seek his help in finding Jahad's data, along with Batis and his daughter. He meets Khun Asencio, and watches in awe as Asencio effortlessly beats the next quest for him and his team. They journey to Data Eduan's palace, and Boro defeated his sworn enemy along the way, which happened to be a monster from a movie he saw when he was little. In the palace, he eats grapes as Eduan tells his team about how Zahard's data changed after receiving the mirror to the hidden hidden floor.

Powers and Abilities
Due to the fact that Boro has managed to retain his Express Ticket for an unspecified amount of time shows that he is no pushover. Boro was able to easily take down a Regular who had managed to kill two previous Ticket holders, further supporting his high level of strength. Boro possesses a blue needle, that he seems proficient with, as well as an Arms Inventory.

Fluid Martial Arts: Boro uses a form of martial arts that allows him to read the movements and characteristics of a weapon and then disrupt it with shinsoo. As long as Boro can read the movements of a weapon he can easily dodge, avert and bypass its strikes, even if the weapon is something as powerful as an Ignition Weapon. According to SIU, Boro's specialty is going against armed people; when his opponents are holding any kind of weapons, it is actually an advantage to him. This is bad news for characters who depend on strong weapons, like Hatsu and Hong Danhwa. On the other hand, people who rely on their bodies or Shinsoo, like Ran, are tough for Boro. Of course, you can’t say who is going to win until they fight, but these things can make one better at guessing.

Quotes

 * (To Hong Danhwa) "I'm sorry, but weapons are just "elementally weak" against me. It's over Mr. President of a fanboy club!"

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Boro