Riliane Lucifen d'Autriche

Rilianne Lucifen d'Autriche, referred as the "Daughter of Evil", is a princess of the kingdom of Lucifenia well known for her short, tyrannical reign. She has a identical twin brother, Allen Avadonia, who later became her most loyal servant. She possesses the Deadly Sin, Vanity.

When Rilianne and Allen were children, they were chased by a "demon" and they decided to "split" day and night between each other, Rilianne being the day and Allen being the night.

Because of a dispute to decide who would be the kingdom's succesor, Rilianne and Allen were separated when they were young. Her parents King Arth and Queen Anne, the monarchs of Lucifenia, died when she was only 14. This resulted in a kingdom ruled by this spoiled child with no knowledge of how to manage an effective government. She was attended by her most loyal servant, Allen, and she didn't know that Allen was her long lost brother.

After assuming the throne, Rilanne lived in luxury and had no sympathy for her people. She imposed high taxes on all the townsfolk and purged anyone who opposed her. One notable person who dared to oppose the princess was Leonhart Avadonia, "Commander of the Royal Guard". She ordered Allen to kill him after she discovered that he was smuggling food from the palace to feed to the people affected by a famine.

At one point, Rilianne was betrothed to King Kyle Marlon but he never shown mutual feelings for her. Instead, he claimed to have fallen in love with one of Keel Freesis' maids, Michaela, who lives in Elphegort. Blinded with jealously, she ordered her army to launch a sudden attack on Elphegort to find Michaela or, if all else fails, murder the entire green haired women. This event became known as the "Green Hunting".

However, Keel hid Michaela in a well and told Allen her location. Allen kept this a secret from Rilianne for quite some time, but Rilianne found out later. She then ordered Allen via a message in a bottle to kill her.

When news spread that Elphegort was ravaged, Germaine Avadonia, adopted daughter of Leonhart, rallyed the people of Lucifenia to put an end to Rilianne's unjust reign. Kyle Marlon joined the revolution under the name "Kachess" to avenge Michaela. At that point, Rilianne hired Gast Venom and the Asmodean Company to help defend her castle. Ultimately, almost all of her supporters fled or were killed by the unstoppable might of the revolutionaries. However, Allen was still at her side.

Allen revealed to Rilianne that he was indeed her brother. He then convinced a very reluntant Rilanne to exchange clothes with each other so that Rilianne can escape. In the end, Allen was put to death by the guillotine.

Rilianne was later found by Clarith who was Michaela's best friend. She later befriended Clarith and continued to live a life of repentence and regret.

Daughter of Evil
Rilianne's namesake song, Daughter of Evil, tells the story from the viewpoint of the general public, from the atrocities she committed all the way to her "execution".

Servant of Evil
Rilianne makes an appearance in the last verses of Servant of Evil, dueting with Allen. Here, she reflects on the execution of her brother and that before he was killed, he said her favorite phrase, "Oh, it's tea time!"

Regret Message
Regret Message continues where Daughter of Evil left off. Rilianne was griefstricken for all that she done and that she caused the death of Allen as well. She later recounts a legend that Allen once told her: That if a person writes a message inside a bottle and throws it out to sea, that person's wish will come true. Rilianne does what the legend says, hoping that if she could be reborn, she will be reunited with her brother someday, in another time.

Daughter of White
Rilianne makes a cameo in Daughter of White, picking off after Daughter of Evil and sometime during Regret Message. Rilianne, under the pseudonym "Rin", was found by Clarith, who was working at a chapel near the harbor. Clarith allowed Rilianne to stay and work there, but then Clarith realized that Rilianne was indeed the "Daughter of Evil" after overhearing her confession one night. She then plotted to kill Rilianne during Regret Message but was stopped by an illusion of a boy who resembled Rilianne. Clarith forgave Rilianne and the two of them became good friends.

Twiright Prank
Twiright Prank happens nine years before Daughter of Evil, when Rilianne and Allen were children. They were chased by a "demon" who wanted to devour them. They then decided to "split" day and night between them, Rilianne being the day and Allen being the night. When the "demon" reached Rilianne, she refused to share her snack with anybody, contrary to what Allen did.

Connections to Other Characters
Allen Avadonia: Rilianne's long lost identical twin brother. When they were separated and reunited, Allen became Rilianne's servant.

Kyle Marlon: Rilianne was once betrothed to him, but he was not faithful in his engagement. Instead, he claims to have fallen for Michaela. This was ultimately the cause of the "Green Hunting".

Clarith: Rilianne's very first friend after the Lucifenian Revolution.

Chartette Langley: One of Rilianne's maids. Although Chartette has a habit of breaking things, she does get along with Rilianne.

Ney Futapie: Another of Rilianne's maids but is in fact a spy. According to Allen, she is more competent at work than he and Chartette and has never angered Rilianne.

Leonhart Avadonia: Commander of the Royal Guard. Rilianne is frequently at odds with him, mostly regarding on what is best for the people.

Gast Venom: Rilianne hired him to help quell the revolution but was killed during the attack.