Summary
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Some anime heroes such as Sung Jinwoo, Kurapika and Jiren prefer to work alone with -in introverted behavior or past injury.
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Characters such as Eren Yeger, Saske, and Katsuki Bakug, also work alone with distrust or revenge.
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Characters such as Y. Ishigami, with Kaguya: love is a war, choose work alone because of injury and desire to avoid trouble.
Anime is often about the characters that combine their strength to defeat a greater enemy. However, some anime heroes go against this trail and prefer to work alone. Usually, these characters demonstrate introvert behavior, making work alone much more effective and convenient for them.

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Even if some of these characters are not introverts, they may prefer to work alone with a past trauma, which makes it difficult to trust other people. Regardless of their motives, the vision of the characters acts on their own and to shoot huge feats will always be incredibly interesting.
8
Sun ginva
Solo alignment
Song Ginva was known as the weakest hunter in history. One day, the strange system chose it, allowing it to increase and gain an incredible amount of skills and strength. Now he prefers to win the dungeon and defeat the enemies himself, because he needs to become stronger.
Technically, it does not win all dungeons alone, as it uses several hundred shadows to fight for it. However, they are part of his ability, and he rarely rests on the help of other characters.
7
Erene Yger
Attack on titanium
Erena was not always lonely who planned everything himself. The younger Erena was definitely a vindictive hero, but he was optimistic and relied many times on his allies. However, all this changes when Erena arrives in the gauze and finds out the truth about the world.

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From here, Erena isolate himself from everyone because he must make rigid decisions that go against what others want. He has several allies who cooperate with him, but Erena quickly ignores them. After all, Erena is one against the world.
6
Kurapik
Hunter x hunter
The whole clan of Kurapik was destroyed by a phantom troupe. Now the purpose of Kurapika is to avenge the fallen comrades and gather the eyes of the clan. Kurapika does not want anyone to interfere with his goals, because he wants to become the only avenger of Kurt.
It is also shown when it is announced that Phantom Troupe is supposed to have died, making Kurapika look extremely sad and empty. At the end of the X Hunter hunter, Kurapika is so far on the dark trail that he does not even visit the sick Hono on the verge of death.
5
Giren
Dragon Ball Super
Jiren is the strongest deadly of the universe eleven and one of the strongest characters of Dragon Ball. He lost his master very early, forcing Giner to believe in his own power alone. While Jiren is part of The Pride Shersers, he likes to work alone because he does not believe in trust others.

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We see it throughout the government, because Jiren does not hope for anyone except himself. It is a classic example of a character who trusts others because of the traumatic event in his past. It took Goku to master the ultra -instinct and work with his past enemies, so that Jiren realize the mistake of his ways.
4
Katsky Bakuga
My hero Academy
While Bakuga undergoes great changes and development, he begins to desire everything himself. Bakuga was urged to work with others to take the hero's exam or even take the villain.
Bakug still prefers to work alone, but knows when to put off the honor and accept the help of other characters. This behavior mainly came from a childhood full of praise, which led to Bakug becoming incredibly confident and brazen.
3
Saske
Naruto
Saske looks like Kurapik in the sense that he does not want anyone to interfere with his search for revenge. Saske uses other people because it must fulfill its goal in any necessary ways. However, he decides that it should face it in their last battle and complete revenge alone.
Even if Saske hunt for Donzo, he does not want anyone to win him except himself. People around Saske are there to make sure no one hinders his battle. Going out of the leaf village, Saske focuses solely on the break of any emotional connection he had, making himself completely alone.
2
Yui Ishiga
Kaguya-Sam: Love is a war
Ishigami-Domestic high school student who has no superpower and life-threatening goals that make him work alone. However, he survived his share of an injury that made him delight from most people.

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Ishigov was one of the members of the Student Council, but he did not show himself to the sixth episode of Kagua: love is war. Ishigami is a type of character that prefers to do with everything and avoiding problems as much as possible.
1
Site
One hit the man
The site is the strongest hero in the world's “single man”. According to the anime name, he wins all his opponents with one blow, at least. He spent a lot of time working alone and winning the monsters himself.
Not later, the site meets the genos and starts other friends. However, it still fights alone because no one else is strong enough to keep up with the site. He also prefers this because he wants to feel the sharp sensations of the battles that the site has long forgotten.

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