Legendary Hero Is Betrayed By Everyone So He Turns Evil And Takes Revenge

AniMaan・2 minutes read

Leo, a powerful hero betrayed by humanity, joins the demon army and marries the demon queen Leah after facing various challenges and battles, ultimately choosing to protect both humanity and demons. Leo's journey of self-discovery and redemption culminates in his acceptance of a new role as the Ambassador between the human and Demon worlds, guided by his experiences and connections with those around him.

Insights

Leo, once humanity's strongest hero, joins the demon army after being betrayed and exiled, showcasing a complex character arc of resentment and redemption.
Leo's journey involves intricate relationships with the demon queen Akida, the Elite Four, and his former human allies, highlighting themes of loyalty, forgiveness, and the pursuit of peace amidst conflict.
Leo's ultimate transformation from a vengeful warrior seeking destruction to a reconciled figure bridging the gap between humans and demons through wisdom and sacrifice underscores the narrative's profound exploration of identity, purpose, and redemption.

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Who is Leo in the fantastical world?
Leo is the strongest hero betrayed by humanity.

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Summary

00:00

Leo's Betrayal: From Hero to Demon Army

Leo, the strongest hero, is betrayed by humanity and joins the demon army before marrying the demon queen, Leah, in a fantastical world of magic and monsters.
Leo, a master swordsman, archer, and magic user, is selected to fight for the human kingdom against the demon queen's army alongside other heroes.
Leo's teammates are incompetent, with the archer being terrible at close range, the swordsman unable to cut a tomato, and the mage posing as a healer.
Leo decides to face the demon army alone, defeating the demon queen's four elite generals, including Edward, an emo assassin named Ms, a wolf girl named Lily, and a weak mage named Shua.
Leo refuses to kill the demon queen Akida, recognizing her efforts to minimize destruction during the demon army's invasion.
Despite Leo's significant contributions, the king exiles him due to public fear and coldness towards him.
Leo, resentful towards humanity, overhears that the demon queen is rebuilding her army and decides to join them.
Leo presents his achievements and skills to the demon queen, Akida, but is rejected and burned by her.
Leo convinces the four elite generals to give him a chance to help the demons take over the world, starting with assisting Shua in managing the demon army's operations.
Leo designs a pendant to match Shua's magic wavelength, allowing a white-haired girl to fill the mana reserves, easing Shua's workload and improving efficiency in the demon army's operations.

12:18

Lily's Journey: Overcoming Challenges with Help

Lily's relentless headbutts cause a boulder to crack, surprising Leah.
Lily runs ahead but faces obstacles, prompting Leah to believe she needs help.
Inside a cave filled with slimes, Lily, with demonic abilities, tears them apart.
Leah, disguised as a bard, intervenes to guide Lily through challenges.
Lily faces a deep canyon, seeks advice from Leah disguised as a bard, and learns to seek help.
Lily jumps off the cliff, swims across, climbs back up, and thanks Leah.
Lily surprises Leah by creating a plan to utilize everyone's abilities effectively.
Akida, the demon queen, discusses her goal of using the Philosopher's Stone to improve the Demon World.
Leo learns of Akida's pursuit of the Philosopher's Stone and her disdain for humans.
Leo trains Ms, a trap assassin, in social skills, leading to a deeper conversation about Leo's true intentions and past experiences.

24:29

Leo: Forgotten Super Soldier, Savior of Humanity

Leo reveals to the Trap that he was once part of a group of super soldiers created to combat demons with enhanced powers from demon DNA.
These super soldiers were created due to the difficulty humans faced in killing demons during a war between the two species.
Leo was the only surviving super soldier and became known as the sword of humanity, protecting them from demons.
Leo shares that after saving humanity countless times, he was forgotten and cast aside when the battles ended.
Leo expresses his lack of resentment towards humanity for their treatment of him, feeling liberated when he was asked to leave.
Leo discloses that he has been defending humanity for over 1,000 years and was also the mysterious Sage who defeated the former Demon King a century ago.
Edward, the general, steps down from his position after a failed battle against a powerful monster called a chimera, feeling unfit to lead.
Juliet, Edward's daughter, criticizes her father for expecting everyone to be as strong as him and seeks Leo's help to make him understand individual strengths.
Leo devises a plan to show Edward the importance of teaching his troops the basics by orchestrating a scenario with a Machine Golem to challenge them.
After a series of events involving the Machine Golem and Edward's troops, Leo successfully guides Edward to defeat the Golem, leading to Edward recognizing his mistake and promising to be a better general.

36:59

"Leo's Revelation: Philosopher's Stone and Conflict"

The Philosopher's Stone is not a wish-granting device but a relic from a technologically advanced age that uses a micro black hole for energy.
A manual detailing the Stone's use is rumored to exist, with humans searching for it unsuccessfully.
Leo reveals there are two Philosopher's Stones in the human world, with one needed by the demon realm.
Leo discloses his true identity as the Black Knight and his purpose of assessing the demon queen's worthiness.
Leo leads the demon queen and generals to a mountain where the second Philosopher's Stone is hidden.
Leo explains the Stone's true nature as an energy generator and advocates for peace between demons and humans.
Leo unveils his origin as an artificial biowa created to protect humanity, now contemplating a villainous turn.
Leo challenges the demons to stop him from destroying both realms, revealing the Philosopher's Stone is within him.
A fierce battle ensues as Leo attacks the demons, showcasing his immense power and resolve to cause destruction.
Lily's plea for Leo to share his problems leads to a confrontation where the heroes unite to stop him, with Edward and the demon queen engaging in a fierce battle against Leo.

49:27

Leo's Redemption: A Hero's Sacrifice and Rebirth

Idna realizes she's in trouble and unable to move as Leo approaches.
Ms attacks Leo with a sure kill technique, but he dodges using Ultra Instinct, suffering a minor cut.
Akinaa gains confidence with Trap Assassin by her side, charging at Leo with support.
Leo focuses on Akinaa, allowing Ms to attack from behind, which Leo also blocks.
Leo expresses a desire to be killed while saving the world, doubted by Mermis.
Leo and Assassin take to the sky, discussing Leo's true intentions.
Leo battles clones created by M to distract him, while M attacks from behind.
Akinaa decides to use her ultimate spell, asking Shua to hold Leo for 40 seconds.
Akinaa recalls a spell taught by her dad, passed down among Demon Kings for centuries.
Akinaa successfully casts the spell, temporarily disabling Leo's powers.
Leo's backstory reveals his creation as an immortal weapon seeking purpose.
Leo's desire to be a hero leads to creating artificial Heroes to destroy humanity.
Leo's encounter with Akinaa makes him reconsider his destructive path.
Leo's final battle with Akinaa ends with her casting a spell to bind his powers.
Akinaa struggles under the spell's strain, while Leo reflects on his past and desires.
Akinaa and Leo share a moment of understanding and acknowledgment.
The Elite Four fulfill Leo's last wishes by attacking him to give him a hero's death.
Despite the attacks, Leo remains alive, revealing his plan to fake his defeat.
Leo instructs Akinaa to remove the philosopher stone from his heart within 5 minutes.
Lily's emotional plea stops M from attempting to remove the stone, revealing Leo's true intentions.

01:01:50

Leo Becomes Demon Queen's Ambassador Amidst Struggle

The Demon Queen appoints Leo as the Ambassador between the human and Demon worlds due to his power and wisdom, despite his panic as time runs out.
Edward agrees with the decision, emphasizing Leo's suitability for the role after living for 3,000 years, and his daughter's fondness for Leo.
Lily confronts Leo, offering her support and reminding him he doesn't have to handle everything alone, leading to Leo's realization that he wants to die to protect Humanity.
Leo, with Shua's guidance, shuts down his mission to protect Humanity, leading to his healing and acceptance of becoming the Demon Queen's underling, promising to help her achieve her dreams.

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