Hugo

Hugo Baint von Renxandt is a reincarnated human, previously known as Natsume Kengo (夏目健吾). He was reincarnated into another world as the son of the Renxandt Sword King.

Personality
Hugo Renxandt wasn't always the megalomaniac he is now. Before being reborn, he was generally perceived as the class "king," with a frank, egotistical attitude and not afraid to hide his thoughts. He often took things a bit too far, but was held in check by his friend Issei Sakurazaki, who understood him well. Issei passed away in the new world, and Natsume was left alone as Hugo Renxandt, prince of the Renxandt Empire.

Although he indiscriminately hates Shun due to their incompatible personalities, he was charming enough be the leader of the boys in his previous life. If he had been able to enter university, work in part-time jobs and enter society as an adult, he would likely have experienced a smooth and successful life.

Hugo became warped due to not having anyone around him who understood his circumstances, not having anyone he could trust due to the troublesome political situation inside the Empire, and not having had any dissatisfaction about how he had lived his previous life.

As it stands, much of the same happened in the new world when Shun and him came face to face. Hugo had finally found his peers from his previous life, only to find that Shun was the center of attention among them, and so Hugo's hatred never changed, and he was left alone to fend for himself in his despair. The true turning point for Hugo's decent into madness was being driven into a corner and abandoned by his old teacher Okazaki Kanami, now known as Filimøs.

At the time when he first met Shun after reincarnating, if he hadn’t tried to avoid Shun due to being aware that they didn’t get along in their previous lives, and if his hard to understand SOS had been noticed, perhaps the end result could also have been different.

Synopsis
Persistently aiming for Shun, he became the criminal who threw the world into a maelstrom of chaos.