Leonis Death Magnus

Leonis Death Magnus (レオニス・デス・マグナス), real name Leonis Shealto is the main protagonist of Seiken Gakuin no Makentsukai. He was once the "Undead Demon King" who reigned in the Holy God Calendar, but as a result of being resurrected 1000 years later by the reincarnation ritual, he took the form of a 10-year-old boy before becoming an immortal.

Appearance
Leonis is the ancient demon king and as such has had various appearances throughout history, his demonic form being the most powerful he has ever had. He currently looks like a 10-year-old boy with purple eyes and brown hair, his original form before he became a devil. Many people find him handsome and quite cool for a young boy.

Personality
Leonis is a very responsible and mature person. He is always clear about his objectives and does not hesitate to annihilate his enemies or anyone who stands between him and his ambitions. However, he has a kind side for those he considers as his subordinates.

It is this contrast between his appearance and personality that has raised suspicions among the girls on his team.

Background
In the Year 447 of the Holy Calendar, Leonis was the strongest Dark Lord who ruled over his nation, Necrozoa. Before becoming a dark lord, he was one of the six heroes, known as Leonis Shealto, the greatest swordsman and the Hero of Holy Sword. He was betrayed by the nobles of his kingdom and assassinated. At this point, he felt many negative thoughts but he can't resent the human kin as he already shows their good and bad aspects. On the verge of death, a girl who had appeared before him when he was betrayed by the ones he’d saved. She resurrected the boy once called a hero, changing him into a Dark Lord. She saved Leonis when he’d lost faith in this world, and then she went on to try to save the world itself. Shouldering that heavy burden with that small body of hers. Leonis instantly comes to worship her and devotes her mission to overthrow the world.

When the remaining five heroes set off to defeat every dark lord blindlessly thinking of them are just cruel creatures. As the one and only remaining Dark Lord, The Undead King, Leonis himself, had to seal his soul in a coffin and will return to life after a thousand years.

When he wakes up from his slumber, he finds himself in the body of a ten-year-old boy. He met a girl named Riselia Ray Crystalia who happened to investigate the ruins with her childhood friend, Regina Mercedes. She tells him that she is from Excalibur Academy. When they are getting out of the ruins, a Void confronts them. In the series of events, she died while protecting Leonis. Unknown to her, Leonis with sorcery resurrect her and being an undead species like him. To his surprise, the world after 1000 years doesn't know about the battle of Dark Lords and Heroes. Much to his delight, the world was already more civilized than he thought, with burning curiosity, he enrolled in the Excalibur Academy. As he promised to Roselia, Goddess Of Rebellion, he had to find out her vessel and build a Dark Lord's army, and conquer the world again. So in order to do that he had to gain every bit of information about the current world.

Special

 * Grand Pressure Wave: An eighth-order gravity-type spell
 * Vira Zuo: An eighth-order gravity-type spell
 * Rua Meires: The hexagonal barrier began spinning rapidly, easily shredding the animallike Void
 * Al Gu Belzelga: An eighth-order fire-type spell, the Grand Annihilation Fireball
 * Destructive Gravity Shot: An Gravity-type spell.
 * Mesta Mord: Realm of Shadows—Shadow Hand
 * Zemexis Jyura: A tenth-order destruction spell—Dark Star Beckoning
 * Cursed Burst Shots: A second-order spell.
 * Meld Gaiez: Massive Extinction Malediction
 * Madia Zolf spells: The Incandescent Inferno Cannon
 * Mel Ziora: A sixth-order spell, the Cursed Inferno Blast
 * Zoah Doma: An Eighth-order spell
 * Swift Flame Wave : A third-order spell
 * Flames of Inferno
 * Hellfire Flurry
 * Sharianos: An eighth-order spell, Multiple Frost Slash
 * Jirus Vera: Dark Dragon of Flames, Devour My Foes— An sixth-order spell
 * Arzam : Darkness, tenth-order spell.
 * Gran Beld: Heavy Destruction Blast, a seventh-order gravity spell
 * Howling Blaze

Normal

 * Agility
 * Protection of the Spirits
 * Sensory Expansion
 * Attribute Protection
 * Mana Barrier
 * Mana Augmentation
 * Physical Augmentation
 * Agility Augmentation

Staff of Sealed Sins
The demon eye staff that Leonis had stolen during a battle against a divine dragon. It holds an immeasurable amount of magic power. In the reference by Leonis, it is a purpose magic tool.

Dáinsleif
The Demon Sword glinted in the light as Leonis readied its black blade. It was the antithesis of a holy sword. It had been blessed by the Goddess who rebelled against the gods of the Celestial Sphere. And since it was wielded by a Dark Lord, it became known as the Demon Sword.

Zorgster Mezekis
Zorgster Mezekis is a The Ark Seventh.

Grava Zol
Grava Zol is a The Ark Seventh.

Riselia Ray Crystalia
Riselia was the one who found the tomb of Leonis and released him thinking that it was a person in distress. Seeing that it was a cute boy, she automatically took him under her care, losing her life trying to protect him, only to be revived by Leonis shortly after. After learning of Leonis' true identity and accepting him as her master, Riselia began to question Leonis' perverted nature.

Despite the latter, it is Riselia who usually provokes Leonis sexually (in part due to her curse), as she has the habit of sleeping naked and hugging him. Over time Riselia has become obsessed with Leonis, rarely leaving his side and calling or looking for him if she feels they have spent too much time apart.

For his part, Leonis sees Riselia as one of his main servants, and over time he has gotten used to sleeping with her (since at first, he used to blush when he saw her naked). Leonis doesn't allow another man to even get close to her, quickly becoming angry if anyone threatens such as Muselle Rhodes (who always stalked Riselia and was revealed to be the worst pervert).

Regina Mercedes
From the moment he saw her, Leonis found Regina attractive (especially her breasts). She noticed this almost immediately and began to play sexual pranks on him when Regina lifts her skirt and shown her panties towards Leone. Despite this, Leonis and Regina get along very well. Like the rest of the girls, Leonis considers Regina his own and tends to get angry if someone tries to hurt her.

From her side, Regina knows how powerful and mature Leonis really is, which leads her to question Leonis' true identity. Despite this, Regina fully trusts Leonis. Due to the contrast between her appearance and maturity, Regina enjoys making bawdy suggestions. Over time, Regina has begun to see Leonis as a real man, so she tends to blush when some unplanned erotic event happens between them.

Elfine Phillet
As with the rest of the girls, the feature that caught Leonis' attention the most was Elfine's huge breasts, followed by her beauty. After getting to know each other better and learning about Elfine's circumstances, he decides to support her in everything, being a source of confidence and inspiration for her.

Shary
Shary is Leonis's personal servant, in charge of attending to all his needs. Leonis's trust in Shary is absolute, being her his personal enforcer as well as the one in charge of protecting Leonis's belongings.

Trivia

 * He is the strongest one of the Dark Lords.
 * He's a closet pervert
 * Leonis likes big breasts, especially those of his 18th platoon companions.
 * After a while Leonis got used to sleeping next to Riselia. (Something that cost him since Riselia usually hugs him naked).
 * Leonis considers all the girls of the 18th platoon as his women (minions) getting angry with anyone who tries to hurt them in any way.