|Manga Debut:||WIZARD!!: The Lord of the Fiery Explosion|
Lucien has the appearance of a young boy; several years younger than his actual age of 17. He is of average height with light-skin, short brown hair and brown eyes. His attire usually consists of very simple clothing.
Lucien is very scatterbrained, but good hearted and hard working. He acts much younger than he actually is, which often irritates Yoko, whom he loves more than anyone else in the world.
With full access to his true memories, Lucien shows extreme wisdom and intelligence.
Once, Luche Ren Ren was known by another name, the name of Lucifer.
Eventually, when the angels were commanded to wipe out humanity, Lucifer rebelled against them for it, and he fell, and was banished from Heaven.
What happened afterwards is unknown, but eventually Lucifer was incarnated in the form of a young boy on Earth, where he became bonded with the wizard Dark Schneider. This bonding had in fact been destined for 400 years, and Dark Schneider had been searching for his missing half for a long time.
Luche grew up as a normal boy, acting as the younger brother of Yoko, the daughter of High Priest Geo Noto Soto. Though they were approximately the same age, Luche looked and acted several years younger than Yoko.Luche appeared one final time in his true form, the fallen angel Lucifer, and use his godlike powers to protect Yoko and many other humans during the battle against genocidal angels in the Elven city of King Crimson. Lucifer projected this adult form from Dark Schneider through a temporary astral body, allowing him to intervene even though Dark Schneider was trapped in Alcatraz space following his battle with Anthrax. Lucifer revealed to Yoko that his childish ignorance was merely an act, and that he was protecting her the whole time there were together. Lucifer then told Yoko they could free Dark Schneider by generating a tremendous amount of light energy equivalent to that of the creation of the universe. The reactor of the Wise Men of Europa's ark, which was powered by the spirit energy of countless slumbering elves, could generate that much energy for 1/6000th of a second if they set it to critical, which would be enough time for Dark Schneider to escape from Alcatraz space. Just before his temporary astral body faded away, Lucifer told Yoko how glad he was to have known her, and to have been loved by her like a mother, a sister, a friend, and a lover.