It could be the bravest student in the class. He or she is not afraid of the monster and decides to face it directly.
Maybe there is a hidden monster in the classroom. It could be lurking in the closet or under the desks, scaring the students and teachers.
It could be the former hero's old rival who doesn't like the idea of the hero changing their role. This rival might see the hero's new path as a threat to their own status.
Ayanokoji could be one of the main characters. He's very intelligent and mysterious, and he might fall in love with a female character like Horikita, who is also smart and strong - willed.
The antagonist could be a super - villain who has a personal vendetta against the hero. He might have used his influence to make the hero's life a living hell and made everyone think the hero was worthless, like garbage. The hero's revenge is all about taking down this super - villain and restoring his own honor and the safety of the world that the villain has been threatening.
Self - realization is key. The hero has to first recognize that he has become a monster. Once he realizes this, he can start to fight against the dark forces within him. For example, he might remember his former self and the values he once held dear.
It might be a natural disaster that has been building up throughout the narrative, like a huge storm or an earthquake. Or it could be a manifestation of the characters' collective fears, taking on a physical form at the end. Another possibility is that it's a new character who enters the story late and is revealed to be the 'monster' because of their malicious intentions or actions.
Perhaps it's a situation that was initially seen as dangerous or negative. For instance, a storm that was expected to cause destruction but instead brought new life to the land. So, the storm is 'not the monster at the end of this story'. Another possibility is a character with a rough exterior. They seem unapproachable at first, like a gruff old hermit. But as the story unfolds, it becomes clear that they have a kind heart and are actually there to protect the protagonist, thus not being the monster everyone might have thought.
Maybe it's a natural disaster. The story could be building up to a huge storm or earthquake that is described as a'monster' due to its destructive power. The events leading to the end could be the characters' attempts to prepare for or escape from this impending disaster.
The hero girl could be on a quest to free a forest that has been corrupted by a tentacle monster. She uses her wits and special powers like the ability to communicate with animals to find a way to purify the monster instead of fighting it directly.
In Beowulf, the hero and monster story motif is central. Beowulf is the quintessential hero. He battles the monstrous Grendel. Beowulf's heroic qualities like courage and strength are highlighted as he faces this inhuman foe. His willingness to put his life on the line to protect the people shows his heroic nature.