Ivis Necron

Ivis Necron (アイヴィス・ネクロン) is one of the Seven Demon Elders created by Anos Voldigoad.

Appearance
Ivis looks like a skeletal mage. He wears a robe that covers his entire body and a headpiece with side ornaments, leaving only his skeletal/mummy face to be seen. He doesn't look to have a bottom jaw and speaks through a jaw-mouth ornament on his chest.

Personality
Ivis is quite smart, as he was able to develop complex fusion magic. Like his fellow Demon Elders, he is nothing, but absolutely devoted to his creator and master, the Demon King of Tyranny.

History
Two thousand years ago, Anos created Ivis and six other demons from his blood, which later became known as the Seven Demon Elders. After his sacrifice, the seven co-operated with the Hero Kanon to create the fictional Demon King Avos Dilhevia in order to divert humanity's hatred of Anos when he reincarnated. With their consent, Kanon fused six of his sources with the Seven Demon Elders, barring Melheis Boran, and gained control over their persons. Since they could not lie to Anos, Kanon erased their memories so that he would not know of their plan.

Afterward, he sought to strengthen demons in order to minimize the number of casualties by the time Azesion commenced its revenge. With his mastery in source magic and Ivis' in fusion magic, Kanon was able to develop the spell Dino Jixes and use it on the unborn Sasha Necron. However, another life was unexpectedly born, and Kanon panicked, as he knew of the tragic ending that would befall her. Knowing that the Demon King of Tyranny would soon reincarnate, Kanon staked their fate in his hands and continued posing as Ivis.

Demon King Academy Arc
Ivis first appears in Class 1-2 as a guest lecturer on fusion magic. Anos casually greets him, but the Demon Elder asks if he knew Anos, as he had lost his memories. Anos uses magic to restore Ivis' memories, but he isn't in them. Ivis then begins teaching about the fusion formula, but Anos informs him that it's flawed and fixes it, increasing its duration several hundred times. Ivis couldn't believe that someone had studied fusion magic before him, but Anos explains that it was all Ivis' work, as it was his first time seeing the formula.

They speak again after class, and Anos explains that someone had changed the Demon King's name and erased Ivis' memory. Ivis concedes that Anos could be right, but it was also possible that Anos is the one who erased his memories. Despite not fully believing him, Ivis decides to remain neutral towards Anos, as there was something familiar about him.

On the night of the twins' birthday, Ivis appears to stop Anos from saving Misha, as she is supposed to merge back into Sasha. Because Anos tries to change the past in order to help her, he catches the attention of the Keeper of Time, Eugo La Raviaz, who fuses with Ivis to aid him against Anos. However, Anos manages to defeat them, destroying the sources of Eugo La Raviaz and an unknown person in the process. Discovering that Ivis' source was still intact, he casts Ingall to revive him. Anos then gives his memories of Ivis to him and tasks him with investigating the remaining Demon Elders in secret.

Demon Sword Tournament Arc
Anos summons Ivis after being nominated for the Demon Sword Tournament, which wouldn't normally invite mixed-bloods like him. They meet up at the Catnip Café, with Ivis appearing under his cat disguise and reporting what he found about the Unitarians' unseen leader and the Lognorth Magic Hospital. Afterward, Ivis is tasked to learn more about his fellow Demon Elder Melheis Boran and the circumstances behind Anos' nomination.

Right before the start of the first round, Ivis reports back to Anos about the secret involvement of the Demon Elders Gaios Anzem and Ydol Anzeo in the tournament and also about Lay's mother, who was hospitalized at the Lognorth Magic Hospital.

Hero Academy Arc
On the first day of the educational exchange, Ivis brings Anos an urgent report about the remaining three Demon Elders, who disappeared from Dilhade and were seen entering the human capital of Gairadite. He also tells Anos about the "deepest darkness", a legend he overheard that seems to be about the reincarnated Demon King of Tyranny. Before being dismissed, Anos tells Ivis to find the missing Demon Elders.

Several days later, when Avos Dilhevia declares war on Azesion, Anos gathers his friends and allies to stop him. Ivis was among the four Demon Elders on Anos' side, and they followed him to where Avos' army was stationed. While Anos heads towards the main castle, Ivis and his fellow Demon Elders stay to fight against the three who sided with Avos.

Eventually, Jerga, the mastermind behind the Hero Academy and the reason why Kanon had to go to such lengths to protect Anos, resurrects. He comments on the pitiful state of the demons from now on compared to two thousand years ago, but Ivis reappears to say that demons haven't gotten any weaker. He then uses Dino Jixes to return the Necron twins back to their proper form, Aisha Necron, who stalls Jerga long enough for Anos to come back and defeat him. After the war was over, Anos teleports everyone back home.

Great Spirit Arc
When Misa awakens her spirit side as Avos Dilhevia, she takes control of many of Anos' old subordinates, including the Seven Demon Elders. Because the legends state that they were subordinates of the Demon King of Tyranny, they are more susceptible to her brainwashing spell. Anos projects himself to the throne room to confront her, but the Demon Elders all fire at him.

Abilities

 * Great Magic Power: As one of the Seven Demon Elders, Ivis possesses a large amount of magic power, with his strength being acknowledged by most demons of the Magical Age. He was effortlessly able to defeat and restrain Sasha and Misha, two demons from the magic age who are considered very powerful in their own right.
 * Shapeshifting: Ivis has been shown to be able to turn into a black cat.

Magic

 * Dino Jixes
 * Je Gum
 * Je Izem
 * Gijel
 * Gazelta

Items

 * Demon Sword Gadol

Anos Voldigoad
Ivis remained skeptical of Anos when he told him that he was his master, the Demon King of Tyranny. Although it was possible that Anos was telling the truth due to his abilities, it was also possible that Anos was the enemy who erased his memories. When Anos demonstrated his knowledge of fusion magic, Ivis became surprised and remarked that there was nothing he could teach Anos, wondering why he was even attending the school in the first place.

Trivia

 * During his fight against Anos, Kanon slips up by talking about the "current Eugo La Raviaz", whom Ivis had no knowledge of.
 * Even though Kanon was possessing Ivis when Anos used Eviy, Anos couldn't look into his memories because he designated Ivis as the target.