Ruki

Ruki is the 3rd demon lord and the daughter of Rchimedes II and Honey.

Apperance
She has long pink hair with bangs, part of which is pushed aside with a hairpiece that resembles a ghost or a skull. On top of her head, she has black wing-like things. Her ears are pointy. In the anime, she has purple eyes, but in the webcomic they are just black.

When she is first introduced, she is wearing a brown cloak, held together with a giant safety pin,  with absolutely nothing under it. Her main form of dress for is a huge white sweatshirt with a big gold zipper and a red stripe up the sides.

When in jail, she wears a stripped prison uniform, like everyone else, but her's is large on her and her sleeves extend much past her hands.

As the demon king, she wears a black cloak with chains in the front.

Personality
Her personality can be all over the place. Sometimes, she acts like the child that she is, but others she is the most mature behaving person in the group.

Plot
She was the one who released all the demons into the human world in the first place by poping popcorn in the Demon Summoning Pot. Later this pot is discovered to have been placed by Dezember and his supporters in their plan to revive Rchimedes. Wanting to fix her mistake, she traveled to the human world to hunt down all 12 of the powerful demons released and send them back to the demon world.

She runs into Ros and Alba when Alba stabs her in the head and rips off her clothes. She later drops the charges, but not before breaking Alba out of prison with Ros's help.

Since she is the demon lord, all the heroes are trying to capture or kill her. FoyFoy sees her and tries to kill her, but is stopped by his soldier, Rudolf. Alba, Rudolf and Ros manage to knock out FoyFoy, thus saving Ruki. Rudolph took FoyFoy and went to explain to the king what was happening, however the trio was captured next time they went into a town and was arrested. While in jail, they ran into Janua, and Ruki happily proclaims that they're neighbors. Ruki and Ros force Janua through the gate and back into the demon world, but Janua pushes his way back to make a request. They end up playing dodge-ball in the jail cell, when Zwei breaks in. After brainwashing Janua, the demon of February tries to go to the castle, but actually ends up in the demensional rift with Ros, Janua, Ruki and Mii-chan.

When in the demensional rift, Ruki meets Samejima, and proclaims that they can trust him since he wears the white socks that the school uniform requires. They then manage to make their way back to the human world, and Ruki spends most of her time in the background.

When Alba is revived by Ros, Ruki is excited and runs over to him, happy he is alive.

In part 2, Ruki helps Alba out on his hero jobs, and uses her gate to transport Alba to where he needs to be. During the battle with the monster at the beginning, she helps the children by using the gate to get them away from the battle, and they were uninjured with the exception of their ribs, which were broken by the gate.

When back at the castle, during FoyFoy's attack, Ruki is in the castle, near the basement trying to help out. Rudolf asks if he's seeing an angel, to which she replies that she is no angel, she is the demon king.

During the soccer match to cheer on heartbroken Hime, Ruki participates, and at one point runs to chase after a stray ball. It is there that she runs into Noin September, the demon who "killed" her father, who is now trying to get rid of her. She freezes and recalls her past before she gained the title of demon lord from her father.

Abilities and Weapons
She has limited magical abilitym despite being the Demon Lord.
 * The Gate: The gate allows people to travel between the demon world and the human world. It can also travel within one world about 50 feet. Humans who use it suffer broken ribs as a side effect, unless they wear a special suit. Unlike her father, she cannot use it as an attack.

Trivia
Ruki is doesn't like heights

Quotes
(To Rudolph) "I'm no angel! I'm the demon lord!"