Rchimedes

Rchimedes is the first demon lord, who created the demon world. He created all of the demons, including the one who took over the demon world after he was sealed, Rchimedes II. He is also Lake and Sion's father.

Appearance
When in Crea's body, Rchimedes has long black and white hair. His eyes are naturally blue, but he colors them using red contact lenses that turn his pupils into crosses. On top of his head, he has black wing things, which are fake, unlike the demons. He has a reputation for having a terrible taste in fasion and wears a terrible green onesie.

Plot
In part 1, several demons are trying to revive him, including Dezember Zwolf, Juli, and Zwei, who later changes sides. During this part, he had a spell of eternal sleep cast on him and he was sealed in the demensional rift. At the end of part 1, he is sucessfully revived when Ros unleases his hero powers to save Alba's life, which broke his seal. He is quickly defeated and resealed by Ros, but not before making a few comments. Alba then decides that he's going to unseal and then kill him, so that Ros will also be unsealed.

Since the demensional rift experiances a different flow of time, in the year that Alba and the others were experiancing in the human world, those in the demensional rift only experianced about an hour. Elf November breaks in before the demon lord is completely resealed, and ends up unsealing the both of them.

At this point, Rchimedes is upset by his strength, and believes himself to be weak for a while before determining that Ros and and Elf are just ridiculously strong, at which point he breaks into dance. His dance is interupted by Mortmone, who claims to be the strongest in the demon world after winning the tournament. To rebuilt his confidence, Rchimedes attacks him and beats him, until Samejima shows up and they have a fight. Rchimedes seems to be winning, until Janua ports there with Ros and Ruki. The battle goes back and forth for a while until Dezember shows up. Rchimedes uses his arrival as a chance to escape.

The next time he appears in the plot, Rchimedes goes to the human world and kills April, whose soul is in Marl's monster body. He then goes on to attack the castle, leading to the final battle.

Rchimedes and his supporters easily knock out Janua, Samejima and Ares, after letting Ros plan an attack. It seems like a win for Rchimedes I, however Alba manages to get Lyman's sword and knocks out some of his supporters. Right afterwards, Rchimedes appears behind him, claiming that he is an arrogant human. Alba responds to this by stabbing Rchimedes in the leg. After falling to the ground in pain and crying "Damn it! Damn it! Don't get cocky!" Rchimedes uses his magic to make Alba's body disappear, sending him to the demensional rift. Nobody knows where Alba was sent and Ros is filled with anger and tries to take on Rchimedes, even though Ros left all his hero magic behind. Dezember then tries to take on Ros, which angers Rchimedes, so he beats Dezember up. Justice gets mad and tries to take him on, but he quickly overcomes her and gets back to Ros. At this time, Rchimedes is feeding off of Ros's anger. Hime tries to attack him, but her attack deals no damage. Then FoyFoy turns up and successfully attacks with his blade of cruelty. After expressing his love for named attacks, Rchimedes begins to battle with FoyFoy, and he knocks a flying Teufel into a rock.

Alba then interrupts the battle, having gained mana. A now-healed Teufel grabs onto Rchimedes' soul, ready to pull it out, however Teufel doesn't have the power to pull it out completely. Rchimedes gets stronger when Dezember offers up all his power to him. Rchimedes is confident that he's going to win the battle, when Ruki and Honey beat up Noin September, releasing Rchimedes II from his control. The two demon lords then face off. Ros powered up Alba as a bat and hit Rchimedes and distracting him. During that moment, Rchimedes II gave Teufel is mana and his soul was pulled out, killing him.

His own soul turned into a black pearl after it was seperated from Crea's body. Ros says his final farewells before giving him his proper burial.

After having a touching moment that didnt last that long, Elf digs his burial spot and takes his soul with him.

In part 3, his soul is pushed into Lake's body and their personalities merge, making Lake the new demon lord. Salt manages to get inside and have a conversation with Rchimedes, where he realizes his wrongs and show appreciation for finally finding out that Lake and Cecily are okay.

Abilities and Weapons
Mana Maker Kun: He gains magic energy from the negative feelings of others and collects it using Mana-Maker kun. With his mana, he is able to use the following:
 * Future Vision: He is able to predict the future. During his first apperance, he is only able to see a few seconds into the future, so by the time he is done predicting, Ros has already punched in the face. The second time he uses it in the story, he goes way too far ahead to the future, but still see the attack.