Lucile Eris

Original : Lucile Eris
Japanese : ルシル・エリス
English : Lucille Eris
Male
Nationality : Roland Empire
Hair-Color : Yellow/Blonde
Eye-Color : Blue

A cold, calm and reserved man, Lucile is the Head son of the Eris Swords-Clan, a position which he inherited after killing his own parents, who were also blood siblings, in order to save Ferris from their father. His action stemmed partly from his more-than-brotherly love for Ferris(though Ferris once mentioned that Lucille would have killed her if she fails to protect Sion). The Eris House is a major House of Roland and for generations had served as personal guards to the King of Roland.
Lucile's real name is Relx Eris. After the "God Devouring" incantation was implanted into his head by Ryner's father, Lieral, he devoured the "Demon portion" of "The Lonely Demon" which was sealed beneath the Eris's house, thereafter acquiring half of His essence and becoming Lucile Eris, "The Weaver of All Formulas". In addition, he also devoured (the Curse for erasing "The Weaver of All Formulas), made a contract with a thousand demons, and devoured the simulacrum of "The Goddess", and consequently gained an immense amount of power. His body has an ethereal nature and cannot be harmed by even "Rule Fragment" artifacts. However, he is not invincible and cannot yet come close to the level of "The Goddesses" in power. To Ryner's Alpha Stigma, he exists as a void which Ryner claims that it is a binding curse placed on him.
Lucille appears to be very knowledgeable regarding the legendary powers of the past such as The Lonely Demon, The Goddesses and The Mad Hero. Throughout the story, his many actions that has proven that such as devouring the "Demon portion" of "The Lonely Demon" and the simulacrum of "The Goddesses" as well as triggering the awakening of "The Mad Hero" in Sion's body. In fact, he told Sion that both he and Ryner are the Gears that move the world in reference to "The Mad Hero" and "The Lonely Demon".
Before Sion became king, Lucile tested his "eligibility" to ascend the throne by having him entering a contract with "The Mad Hero", and thereafter backing him in the revolution, which in truth was driven by his own hidden agenda, where he will not hesitate to kill Sion if he (Sion) strays from his (Lucile) intended path. While he can apparently be at anywhere almost instantly within Roland, because of a curse, Lucile's movements are restricted and he is unable to set foot outside the Roland Empire. However, the limitations are correlated to the current boundaries of Roland, and as Roland's boundaries expand, Lucile's ability to move freely expands as well. Lucile normally stays in the shadows, close to Sion whenever he is in Roland, in order to guard him from assassins sent by "The Goddess".
He once told Ryner that they are both monsters and are not worthy of having Ferris who is a human. He further states that he only allowed Ryner to be with Ferris because he cannot obtain or reach for anything with his blood-stained hands when his life itself is of no value. In fact, Lucile cares for Ferris to the extent that Miran Froaude claims that Ferris is Lucile's weakness.