Meruem

"Who am I? Why am I here? A king with no name. A borrowed castle. My subjects are mindless drones. If this is the mandate of Heaven I have been given... I fear... I fear nothing... except the tedium that it will bring!!!"

- Meruem

Meruem is the main antagonist of the "Chimera Ant" arc of Hunter x Hunter. He is the most powerful offspring of the Chimera Ant Queen, and the King of the Chimera Ants

Personality
Meruem is initially seen as a cruel, violent, ruthless, and aggressive leader. The Queen's intention to give birth to a perfect offspring is reflected in Meruem's mentality, with the Ant being haughty towards all. He speaks in an eloquent manner and has refined tastes for one of his species. He considers himself superior to all other forms of life and feels no concern for his dying mother after his birth. Meruem is also very merciless and inconsiderate, killing and cannibalizing any Chimera Ant he deems as disrespectful. Though he could still hold respect towards the strong, complimenting Neferpitou for surviving an attack that had killed many without much damage at all.As the story progresses, Meruem starts to grudgingly respect Komugi, a human woman. He eventually grows to even care for her. From there on, Meruem begins to question the differences between the Ants and mankind. He battles with his identity as a half-human and half-insect, questioning the nature of violence and strength as true power.He is quite adept and learns things at an astonishing rate, being capable of mastering any form seen of board games in just ten matches and defeat world champions with ease. During this time it is seen he displays a code of honor and disapproves of winning unfairly as demonstrated when he rips his left arm after placing a bet with Komugi to scare her and disrupt her game and even allows her to rest so that she can be at the best of her ability as he sees no point in winning otherwise. After a brief loss of memory he seems to become much more respectful and closer to his subordinates after being fed a part of them when he was dying, as he can feel things they can feel, and tell easily if they are hiding something or not from him, but at the same time he can sense their loyalty to him, causing him to put their loyalty to the test before considering to punish them, even more so if they answer truthfully despite doing so may inquire admitting to a miscalculation.

Abilities and Powers
Even before his absorption of Youpi and Pouf, Meruem is already extremely durable. He easily withstands thousands of attacks launched at him by Netero, one of the most powerful human fighters in the world, without suffering a single scratch. And Netero's Zero Hand, which uses up all of his aura in an intensified blast, could barely give him cuts and bruises, he didn't even use any nen against Netero.

Immense strength: Meruem's physical strength is inconceivable as he was able to use only one powerful strike with his tail to kill several other Chimera Ants. He was able to shatter a massive wall inside the Queen's nest with only one punch. He also was able to rip off Netero's left arm and right leg easily. He can also rip off his own arm easily. After absorbing the Menthuthuyoupi and Shaiapouf, he could knockout Knuckle and Meleoron with a tap on the shoulder. However, there is a possibility of this being used with Nen.

Immense speed and reflexes: Meruem can rip off limbs and obliterate entire bodies in less than a instant. He can move at extremely fast speeds when fighting Netero despite Netero landing multiple strikes upon him, he later than began to rip off Netero's left  arm and right leg in a flash by also dodging Netero faster-than-sound attacks. After absorbing Menthuthuyoupi and Shaiapouf, he gained the ability to fly, allowing him to move at super-sonic speeds in mere seconds.

Immense durability: Meruem is extremely durable as he was able to take thousands of incredibly-powerful super-sonic blows from Netero without suffering even a single scratch. He was also able to take on Netero's most powerful move, the Zero Hand, which launches Netero's entire aura upon his opponent and he only received cuts and bruises. He was able to survive the ultra-powerful explosion of the Old Man's Rose that was released after Netero's death and despite his body being nearly destroyed in the process, however, he was still alive after the fatal attack.

Immense agility: Meruem is able to move from angle to angle deftly. Immense pain resistance: Meruem was able to survive Netero's Zero Hand while not appearing to from be different in the least, and he ripped his arm off without hesitation.

High Intelligence: Meruem has extraordinary intelligence being able to learn and master nearly anything he comes across of, he also uses his intelligence for Gungi in his battle against Netero and eventually succeeds by doing so. Also, seeing as how he epitomizes the meaning of melting pot, his intelligence is far beyond the likes of even the most intellectual humans.

Enhanced perception: The time that he spent when playing gungie with Komugi have greatly bolstered his skills in perception and has gave him supernatural foresight as he can disrupt the flow of his opponents efficiently.

Excellent strategist: He can create quick and effective means to defeat Netero during his intense battle and found a way to elude through Netero's powerful defenses and was able to severely injure Netero in the process. Proficient in hand-to-hand combat: Meruem relies almost entirely on swift single blows bare-handed, including his deadly tail. He is able to decapitate anything in an instant.

Trivia

 * Meruem is very similar to Cell from Dragon Ball and Kars from Jojo's Bizarre Adventure.