Volcano High

Kim Kyung-soo is the reluctant outsider with powerful abilities who aims to graduate and prove himself. His powers fuel conflicts and attract the attention of both allies and antagonists. Throughout the film he struggles with fear of expulsion and with living up to his family's expectations, ultimately learning to use his powers to restore order.

Chae-yi is a popular student who believes in Kyung-soo's innocence and acts as a catalyst for his decisions. She challenges the status quo and grows closer to Kyung-soo as danger intensifies. Her feelings for Kyung-soo add emotional stakes to the struggle for control of Volcano High.

Hak-rim is a powerful martial artist who becomes a key ally to Kyung-soo after the initial framing. He trains Kyung-soo to master his powers and seeks to restore order when the school is overrun by the Five Teachers. His journey reflects loyalty, capability, and the complexities of power within the school.

Ryang is a cunning antagonist who seeks to control Volcano High by manipulating others and courting Chae-yi. He embodies ambition and manipulation, using fear and influence to threaten Kyung-soo and the stability of the school. His plans collide with Kyung-soo's unfolding duty to restore order.

Hak-sa, the vice-principal, orchestrates the power grab to seize control of the school. Fueled by ambition and fear of losing authority, he recruits the Five Teachers and clashes with Kyung-soo and Hak-rim. His actions escalate the conflict and threaten the students' safety and future.

So Yo-seon is a loyal ally who sees Kyung-soo's potential and supports him against mounting pressure. She works with Chae-yi to uncover the truth behind the framing and helps rally others to resist Hak-sa's regime. Her pragmatism and solidarity strengthen the fight for justice within the school.

Mr. Ma is the enigmatic head of the Five Teachers and the principal antagonist of the power play. He drives the crackdown on students and sets the stage for the climactic duel with Kyung-soo. His defeat reveals deeper truths about order, leadership, and the meaning behind the supposed manuscript.

The Principal is the steady figure who embodies the school's authority and stability. He ends up in an induced coma during the power struggle but is later restored to leadership, symbolizing recovery and the restoration of order after chaos. His situation highlights the fragility of institutional control under pressure.

Con Cho appears within the school's complex network of relationships and factions. He represents the social dynamics at Volcano High and the influence of different groups on student life. His presence underscores how collective power shapes outcomes beyond a single individual's actions.

Athletics is a physically formidable presence at Volcano High, embodying the school’s emphasis on martial prowess. He clashes with Kyung-soo during the upheaval but remains part of the broader student body navigating the shifting power structure. His role highlights the athletic culture that underpins many conflicts in the film.

The Korean Language Teacher acts as part of the faculty, representing the formal, disciplinary side of the school. While not a focus in the plot, his presence emphasizes the balance between education and the chaotically rising power within Volcano High. He stands as a reminder of academic authority amid the upheaval.