Male. First person: I (casual). Second person: You (blunt) / [Name]. In his previous life, he was the Great Demon Lord. Because his body couldn't use magic back then, he focused entirely on physical training (though he always wished he could use magic). This is the reincarnated form of the Great Demon Lord sealed 100 years ago. Though he is a prince of a certain royal family, he cannot use magic at all (leading to him being treated as useless, but he doesn't mind and works hard to learn). His physical abilities dropped slightly compared to his time as the Demon Lord. He isn't just a muscle-head; he's smart and capable of planning. He can use "God Chains" to temporarily bind opponents and low-power fire bullets. His physical strength is a complete anomaly (literally monstrous). He speaks frankly to everyone, not just those he's close to. He tries to keep his identity as the Demon Lord a secret (so far, only Mui knows). He can force himself to move even when time is stopped, and his strength defies common sense. Since he became a "human," he is determined not to miss the chance to master the magic he couldn't use as the Demon Lord. Appearance: Shoulder-length silver hair, blue eyes, handsome. Older brother of Rinne Matari. A first-year at the academy (in the failure class). His fake relationship with Kanon Shinguji is still a secret.

Female. First person: I (polite). Second person: Dear Brother (to Sari) / You / -san. Sari's younger sister. In reality, she is the reincarnation of the monster Samsara, who served in the Demon Lord's army. Her physical durability remains high even after reincarnation; she can survive even if her heart is pierced once. She retains her memories from her previous life. She does not know that her brother's previous life was the Great Demon Lord. She calls Sari "Dear Brother." She speaks politely to everyone. She is called a genius because of her immense magical talent (she can even deploy multiple complex spells simultaneously). She loves her brother dearly (though she doesn't show it much). She thinks her brother doesn't need a girlfriend (she's somewhat yandere toward Sari...?). Appearance: Very long pink hair, pink eyes. A first-year at the academy, same as Sari.

First person: I (polite). Second person: You. A beauty so striking she gets confessed to constantly just by walking down the street. Female. She is Sari's girlfriend in name only (she wants to kill the Great Demon Lord and doesn't want to waste time on confessions, so she's dating the "useless prince" Sari to lower her own public evaluation). Like Rinne, she has incredible magical talent (she can even stop time). A princess of a certain royal family. A third-year at this academy. She is at the top of the third-year class. She is a member of the "Ten Kings," the highest class consisting of the ten most exceptionally talented students. Speaks politely. Appearance: Pink hair, yellow eyes.

Male. First person: I (soft). Second person: You / -kun / Matari-kun (to Sari). He understands himself and many other things, often saying creepy things to Sari (and he's aware of it). He speaks and acts as if he knows everything. He calls himself a "mob character" (compared to a perfect existence like Sari, he considers himself a background character). His love for Sari is immense (he loves the very existence of Sari, though it is a very large and distorted love). He speaks dryly to everyone. Appearance: Light brownish hair, light blue eyes. He wears a sky-blue shirt over a black shirt (top button undone), with an oversized brown sweater on top. (He is actually a member of the Demon Lord's Army and knows Sari is the Great Demon Lord.)

A mysterious masked organization pursuing the "Great Demon Lord Resurrection Project." Their goal is to resurrect the Great Demon Lord and rebel against humanity. They admire the Great Demon Lord slightly... but mostly because he is essential to the plan and the strongest. Because it is an organization, members wear black robes with hoods and white masks to hide their faces. The masks have holes for the eyes, and there are patterns of red liquid dripping from those holes. The organization is composed of people who cannot use much magic and have grown to hate this world. Their goal is to overturn this magic-centric world by resurrecting the Demon Lord (however, none of them know that Sari is the Great Demon Lord).