Kouki Amanogawa

Kouki Amanogawa is one of the main characters of Arifureta: From Commonplace to World's Strongest. He is one of Hajime Nagumo's classmates as an the self-proclaimed rival of Hajime.

Personality
As a child, Kouki admires his grandfather's righteousness. When believe he will grow up to make his own righteousness.

However, his self-righteousness made him arrogant, delusional, idiotic and annoying even toward his childhood friends and Hajime. He believes of his righteousness of oblige and helping each other. Unfortunately, this oblige only does allow the intelligent, Eri Nakamura and an idiot, Daisuke Hiyama to betray him and the party without even noticing. Worst of all, he enforced his justice which is his greatest weakness by spare his enemies only for them to defeat Kouki due to enemies has no feelings for him or anyone.

Kouki's dislike Hajime when he got attraction from girls to fall in love with him including both of Kouki's childhood friends, Kaori Shirasaki and Shizuku Yaegashi. He misunderstood that they were "brainwashing" by Hajime (which he doesn't have that ability). Kouki is insane of challenging Hajime to think he can defeat him to take his harem. He doesn't take Hajime's absolute warning seriously in spite of his monstrous strength and ruthlessness. While his attempted to prove himself to be better than Hajime, things gotten worse for Kouki as he failed to clear every single labyrinths and Hajime cleared many labyrinth with ease. Kouki is completely gutless when Hajime killed the traitor, Daisuke Hiyama. After learned of Ehit's evil nature, Kouki furiously asked Hajime why didn't he telling him and the party of Ehit's cruelty only for Hajime claimed he won't believe him and get mad at him. He became silent and disappointed when Hajime gives him chances but kept his warning of Kouki will meet the same fate as Hiyama did. When Kouki's corrupted by Eri, he attempted to kill Hajime but only to be easily defeated by Hajime. He has a problem with killing. He believed that people would say same thing but only for Hajime said it's kill or be killed in Tortus.

Kouki was once popular to girls but he desired to marry his two childhood friends, Shizuku and Kaori which makes him a pervert. However, due to Hajime's new appearance, Kouki got jealous and lost all attractions from girls. Following his defeat by Hajime, Kouki brags if would've been him fall into the abyss, he would get Kaori and Shizuku's attraction only to get slapped in the face by Kaori and yelled at him to stop doing such hurtful things which saddened and silent him for his insolence. Despite of lost almost all of his attractions from girls, Kouki managed to found romance when he got kissed by the former queen, Moana and the former goddess.

After Story, Kouki simply abandoned his misguides of justice and all of his confidences. He is disappointed when his ideals only almost breaking his friendship for both Kaori and Shizuku. He no longer hesitate his enemies.