Kaibara is a transferred person and a fallen angel known for his "Gluttony" (Survival of the Fittest) skill. He played a key role in killing the Demon King and destroyed Tama's homeland of Gruen. Kaibara is infamous for his cruel and spoiled personality. He was hated by Sensei, defeated by Tama after she regained her true self, and finally killed by Waldelia. Kaibara comes from a privileged and careless background in his original world and is disliked by many fans for his actions.
Kaibara is a young man.
He usually wears a bathrobe over his underwear.
Kaibara is a spoiled rich kid.
He does not seek any special goals and just drifts through life.
He feels a deep sense of emptiness.
Kaibara can be very cruel, hurting a maid just to distract himself from his worries and attacking homeless people out of anger.
He shows strong signs of being a psychopath.
In his original world, Kaibara is the son of a powerful figure.
He never makes real efforts to find meaning in life.
Instead, he relies on his privileged environment and lives in a lazy, careless way.
His parents protect him by using their money to cover up any problems he causes.
Because he never faces consequences, he develops a cold and cruel side.
Kaibara possesses the skill called "Gluttony" (Survival of the Fittest).
When he uses it, a giant mouth appears from the shadows and devours everything around.
This makes him extremely dangerous in battle.
Killing the Demon King and Destroying Gruen
Kaibara is one of the main figures in killing the Demon King.
He also leads the attack that crushes Tama’s homeland, Gruen.
Conflict with Sensei and Tama
Kaibara’s cruel personality makes Sensei look down on him.
Sensei refuses to let Kaibara use his skill at first.
With Sensei’s encouragement, Tama finds her true self and defeats Kaibara in battle.
Death by Waldelia
Waldelia appears on the battlefield and kills Kaibara.
Some fans jokingly call Kaibara "Dirty Jotaro" online.
The nickname comes from his similar powers to a famous manga character, but also from his lack of redeeming qualities.
Many fans think it is good that Kaibara was killed by Waldelia instead of being sent back to his world.
They believe he would only repeat his bad actions if he had another chance.
Kaibara's name origin may reference a real person.
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