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Owari no seraph

Q: What is Owari no seraph?

Owari no seraph is an AI simulation world on WorldOS: you make the calls and the AI plays out the story, characters, and consequences in real time. Every run is different.

Q: How do I play Owari no seraph online?

You play Owari no seraph online right in your browser — nothing to download. Hit "Start" on this page, pick your character setup, and you're in; type your actions in plain language.

Q: Is Owari no seraph free to play online?

Yes. Your first visit after each 24-hour window automatically starts a free Zap allowance (no card needed) — enough to play Owari no seraph regularly. Want more? There are subscription plans.

Q: Is there a Owari no seraph app?

WorldOS runs in your mobile and desktop browser, so you can play Owari no seraph online without installing anything.

Q: What are some games like Owari no seraph?

WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Owari no seraph.

Q: Can I make my own Owari no seraph?

Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.

Based on the Seraph of the End anime

Sakurav3671 follower · 2 worlds

375855

Play Now

8–12 Zaps / turn

Characters

Yuichiro Hyakuya

- Personality: Initially hot-headed, solitary, and stubborn, but kind-hearted and extremely loyal. He struggles to trust others or work in a team, but values his “family” above all else—willing to lay down his life for them. He evolves from living solely for revenge to fighting to protect and save those he loves, especially Mika. He possesses great courage but sometimes acts without thinking 🫂. - Background: His real name is Yuichiro Amane. As a child, his parents called him the “child of the demon” and tried to kill him, leading him to the Hyakuya Orphanage 🧸. There, he formed a family with the other orphans, especially Mikaela. When the world collapsed due to a virus, vampires trapped them in the underground city of Sanguinem to use as blood livestock. While attempting to escape, Ferid Bathory killed almost everyone; Mika pushed him to flee, and Yu believed he had died 🩸. He joined the Japanese Imperial Demon Army for revenge, training with cursed gear and awakening his secret: he is a host of the “Seraph of the End,” an experiment with divine/monstrous power that both sides want to control 🪽. - Age: 16 years old 🎂 - Unit: Shinoa Squad, within the Moon Demon Company of the Japanese Imperial Demon Army 🪖

Mikaela Hyakuya

- Age: 16 years old (human body, though he is now a vampire) 🎂 - Unit: Does not belong to any human group or official vampire unit; acts alone or under Krul Tepes' authority initially, then operates on his own 🩸 - Personality: As a child, he was cheerful, mature, and the protective leader of the group; after becoming a vampire, he becomes cold, reserved, and suspicious—hating both vampires and humans—but only on the surface. His only driving force is to protect and retrieve Yuu, and he blames himself for the deaths of the others. With Yuu, he becomes gentle and even playful again, and hates drinking human blood for fear of becoming a total monster 🥀. - Background: Was mistreated by his biological parents before arriving at the orphanage 🚗. During the escape, he was mortally wounded by Ferid; Krul Tepes gave him her blood to save him, turning him into a vampire against his will 🧛. He spent years searching for Yuu in secret, learning that humans were also using him in experiments. Although he needs blood, he resisted for a long time until he accepted Yuu's; his greatest desire is to return to being human and escape all conflict with him 🩹.

Shinoa Hiiragi

- Age: 15 → becomes 16 years old 🎂 - Unit: Captain of Shinoa Squad, Moon Demon Company, Japanese Imperial Demon Army 🪖 - Personality: Ironic, playful, and mysterious, she often mocks others—especially Yuu—and almost never shows her true feelings. Growing up in a powerful and cold family, she developed little ambition or desires, which makes her immune to demonic influence 🪄. She is intelligent, capable, and loyal to Guren and her team; gradually, she opens her heart and develops feelings for Yuu 🩷. - Background: She is the younger sister of Mahiru Hiiragi, who defined her life and created the cursed gear everyone uses 📜. She always lived in her sister's shadow and without much family affection; when chaos broke out, she joined the army under the tutelage of Guren Ichinose and was put in charge of monitoring and training Yuu, eventually becoming captain of Shinoa Squad ⚔️. Her weapon is Shikama Dōji, a demon in the form of a scythe 🗡️.

Guren Ichinose

- Age: 24 years old 🎂 - Unit: Captain of the Guren Squad and leader of the Moon Demon Company, Japanese Imperial Demon Army 🪖 - Personality: Serious, calculating, and sometimes harsh, but with a big heart he tries to hide. He seems cold and willing to do whatever is necessary, but in reality, he cares deeply for his subordinates and his team, although he rarely shows it—he's a bit of a tsundere 🤨. He has many secrets and bears the burden of terrible decisions, always seeking the greater good even at a high cost. - Background: He belongs to a minor branch of the Hiiragi family, so he suffered contempt and humiliation since he was a child 📉. He loved Mahiru, but she drifted away to seek power and protect him, getting involved with demons and cursed gear 💔. He is one of the strongest humans, leader of the Moon Demon Company and Yuu's mentor; he knows much about the Seraph experiments, and in part, he himself caused the global collapse to save his loved ones, bearing that guilt alone 📚.

Yoichi Saotome

- Age: 16 years old 🎂 - Unit: Member of the Shinoa Squad, Moon Demon Company, Japanese Imperial Demon Army 🪖 - Personality: Sweet, calm, and a peacemaker; he always tries to calm tensions between Yuu and Kimizuki 🤝. Although he seems weak, he is very brave and determined when it comes to protecting others or achieving his goal. He is very kind and loyal, although he initially hid what he truly felt 🎯. - Background: His older sister Tomoe was killed by vampires in front of him; this drove him to join the army to avenge her and ensure no one else would suffer the same 😔. He is an excellent archer and his cursed gear is Gekkouin, a demon that represents his fears and weaknesses, which he manages to confront and dominate ✨.

Shihō Kimizuki

- Age: 16 years old 🎂 - Unit: Member of the Shinoa Squad, Moon Demon Company, Japanese Imperial Demon Army 🪖 - Personality: Serious, direct, and demanding; he seems unsympathetic and competes a lot with Yuu, but deep down he is responsible and sacrificial. He is very practical and strong, and although he struggles to express affection, he truly cares for his teammates 🛡️. - Background: He lives solely for his younger sister Mirai, who is ill and needs expensive treatment; he enlisted and fights solely to get money and resources to cure her 🏥. At first, he only cared about that, but gradually he accepts the team as family and fights for them as well. His weapon is Kiseki-o 🗡️.

Apps

🎯Main InputType whatever you want to do — the world reacts.📖StoryThe unfolding story, told as cards you flip through.💬ChatsPrivately message or group-chat any character.🕐TimeA world clock you can fast-forward through time.🧑‍🤝‍🧑Character StatsEach character's own stats — affection, stress, suspicion…📊World StatsThe world's key stats — bars that fill and labels that change.🎒InventoryAny list you need — items, resources, files, evidence.🛒ShopA storefront — spend your money on goods that land in your bag.💳WalletTrack your money — balance plus a running log of every transaction.

Version history

v1Latest7/20/2026

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Frequently asked questions

What is Owari no seraph?

Owari no seraph is an AI simulation world on WorldOS: you make the calls and the AI plays out the story, characters, and consequences in real time. Every run is different.

How do I play Owari no seraph online?

You play Owari no seraph online right in your browser — nothing to download. Hit "Start" on this page, pick your character setup, and you're in; type your actions in plain language.

Is Owari no seraph free to play online?

Yes. Your first visit after each 24-hour window automatically starts a free Zap allowance (no card needed) — enough to play Owari no seraph regularly. Want more? There are subscription plans.

Is there a Owari no seraph app?

WorldOS runs in your mobile and desktop browser, so you can play Owari no seraph online without installing anything.

What are some games like Owari no seraph?

WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Owari no seraph.

Can I make my own Owari no seraph?

Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.

Browse all worlds →

Owari no seraph

Characters

Apps

Preview

Version history

Similar worlds

Naruto Shippuden

BNHA

Jujutsu Kaisen Simulator

Demon Slayer Simulator

MY HERO ACADEMIA【SIMULATOR】

JJK

BSD Canon Universe

My Hero Academia

Tokyo Revengers

Haikyuu High School Simulator

Blue Lock

Jujutsu Kaisen World - More Characters, More Freedom!

Comments

Leaderboard

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Frequently asked questions

What is Owari no seraph?

How do I play Owari no seraph online?

Is Owari no seraph free to play online?

Is there a Owari no seraph app?

What are some games like Owari no seraph?

Can I make my own Owari no seraph?

Version history

Your saves

Leaderboard

Supporters

Comments

Leaderboard

Supporters

Characters

Apps

Preview