Koku Hanabata

Koku Hanabata, also known by the code name Trumpet (トランペット), is the leader of the Hearts and Mind Party who was secretly a leading member of the modern Meta Liberation Army. He is one of the main antagonists of the Meta Liberation Army Arc.

He later became one of the nine lieutenants of the Paranormal Liberation Front, an organization formed from the remnants of the League and the Meta Liberation Army.

Appearance
Koku is a man with reasonably long, dark hair that he wears swept back, a single strand left hanging down over his face, thin eyebrows, and a small mustache. He has an angular nose and small, feminine eyes with pale irises.

He wears a plain business suit, consisting of a white dress shirt, a black tie and a black blazer.

Personality
Koku portrays himself as a calm and level headed man, as he was not fazed by Curious' death, and instead displayed his intelligence and skills in manipulation by instead taking advantage of her death and along with using his Quirk to further motivate and strengthen his comrades instead, showing his skills as a worthy leader and military commander. He's also shown to be arrogant as seen when Spinner compared himself to the Meta Liberation army and stated how they were the same, earning his malice by insinuating that Spinner was his equal.

Meta Liberation Army Arc
Koku is present at the meeting of the Meta Liberation Army with his fellow executives. He informs Re-Destro that he has found someone who appears to be affiliated with the League of Villains and suggests making contact with them soon, which Re-Destro orders him to do at once. The affiliate is revealed to be Giran, who is dragged into the room and interrogated by Re-Destro. After Re-Destro has gathered the information he needs, the executives are dispatched to prepare for the League of Villains' arrival.

Koku and Curious are waiting at Deika City when Slidin' Go escorts the League of Villains there. Koku greets the League, explaining that 90% of Deika City's population, including the heroes, is made up of Liberation soldiers. He thanks them for coming so far to visit, declaring today to be a day of celebration and the League to be guests of honor. With that, Koku initiates the Revival Celebration and the soldiers begin their attack on the League. Koku tells them that if they're looking for Giran, he can be found in the tower behind them with the Supreme Leader, to which Twice angrily accuses him of reneging upon their agreement.

After Curious is killed by Himiko Toga, Koku moves onto the battlefield in his campaign car and announces the details of her death to the Army. When asked what the Supreme Commander's response was, Koku relays Re-Destro's plea that Curious' sacrifice not be in vain, prompting a large group of soldiers to rush at Tomura.

After Twice's clones help Tomura and Spinner get close to the tower, he once again gives a speech to the soldiers, inciting them to fight more vigorously. Spinner notices how every speech of his rallies people up, so he decides that he should take care of him. Sometime later, Spinner starts getting closer to Koku's van, while exclaiming that someone like him shouldn't be on the front lines. Koku ignores his comments and activates Sevens Loud, a Detnerat mask device, which amplifies the capabilities of his Quirk, Incite. That causes the soldiers to attack their enemies with even more fury and enthusiasm. Spinner evades them by using Gecko to climb on the nearby wall. Trumpet comments on how Spinner's behavior fits his Quirk perfectly, as he claims it is a pathetic one. Koku and Spinner get distracted for a moment when the tower, in which Re-Destro was, collapses. Spinner gets ambushed by the soldiers, but Koku orders his followers to go help the Grand Commander, fearing for the latter's life. An injured Spinner then gives a speech about how he understands his life wasn't worth much up until he had seen Stain on television, which gave his life a new meaning. He admits he can't accomplish anything without help from others, but he sees nothing wrong in that, calling Trumpet to be no different than him, much to Koku's contempt. As Gigantomachia rages through Dekia, Koku rushes towards the Grand Commander's location, with the intention of protecting him, unaware that Spinner clung to his van. However, as he arrives at the scene, everything around him begins to decay, as a result of Tomura's liberation. After the dust settled, he orders the remaining MLA members to attack, however, much to his shock, his Incite is being nullified by Tomura's glare. Re-Destro then orders him and the rest of the Liberation Army to stand down, as any casualties now would be meaningless. He then surrenders the MLA to Tomura.

One week after the Revival Celebration, Trumpet, along with Skeptic lead the recovering League members to a meeting in the Army's headquarter. When they arrive on stage, Re-Destro announces, that the Meta Liberation Army will merge with the League of Villains and form the Paranormal Liberation Front. Furthermore, nine members on stage, including all LoV members and the MLA's most prominent members (including Koku) will be the Front's nine lieutenants. After the speech, Koku is seen lingering on how Re-Destro is being docile towards Tomura.

Endeavor Agency Arc
He is attending a meeting of the Paranormal Liberation Front's lieutenants, during which he and his allies discuss the upcoming goal of the army that would take four months to put in motion.

Paranormal Liberation War Arc
When the PLF is divided into several regiments, Koku, along with Re-Destro isn't taking part in any of them. By the time the Heroes start the raid, he and Re-Destro prepare to lecture their followers in the sanctuary below the Gunga Mountain Villa. However, one of the followers informs them that they are under attack and that every one of their communication escape routes barring the ones located at the mansion has been blocked. Upon hearing this unexpected attack from the Heroes, Re-Destro's Stress levels start increasing, indicating his irritation towards them for finding his hideout. When Tsukuyomi uses his Ragnarök to cut off the last escape route, Trumpet accompanies Re-Destro, as the latter retaliates against the heroes' attack. However, the prosthetic legs don't handle Re-Destro's weigh and crack, sending the villains flying back to the basement while cutting off their secret escape route.

Abilities
Political Authority: Being a politician, Koku has some level of influence within the Japanese government and society in general. Since he's the leader of his own political party, he has full authority over it as well.

Leadership Skill: Koku is one of the Top Commanders of the new Meta Liberation Army, a military force that consists of over 100,000 members.

Charisma: Koku has been noted to possess an incredible level of charisma. He was able to raise the spirits of the Meta Liberation Army members and convince them to continue fighting, even after negative events, such as the death of Curious and the appearance of thousands of Twice clones.

Meta Ability
Incite (煽動): Koku's Meta Ability lines his voice with an electromagnetic pulse. If someone who considers Koku a worthy leader hears his voice, then their physical and mental state will be significantly enhanced. The louder Koku's voice is, the more effective his Meta Ability becomes. Using this power to strengthen someone takes a toll on the recipient's body.

Equipment
Sevens Loud: Koku uses a helmet manufactured by Detnerat with seven built-in amplifiers to enhance the range and volume of his Quirk. The helmet is normally concealed as a pair of wristbands.

Trivia

 * Koku’s first name contains the kanji for "cavity, hole, slit" (孔) and "body cavity" (腔), and his surname contains "flower" (花) and "field" (畑).
 * Koku's MLA codename, Trumpet, makes him the only MLA executive not to have a codename based on an emotion.