pain, and "sins" of the other members. He also heals the other Zweilts by empathically taking their injuries upon himself, usually to the point that he collapses and won't wake for several days. The Zweilt Guardians feel a great amount of guilt for this. Yuki has been reincarnated many times, however this is the first time he was reborn male. It has been mentioned this may be a sign that the fighting is coming to an end or that she wants to forget the past wars and the time she had with her duras lover Luka. A man with silver eyes and black hair who's been protecting Yuki from the shadows ever since his birth 15 years ago. Despite being a Duras (a.k.a. demon), he's currently an ally of the Giou Clan and is recognized as a traitor by the other Duras. Although his real age is unknown, his appearance is that of a college student. Normally reserved and indifferent, his facial expressions soften when he's with Yuki. His relationship with Yuki is complicated. He is completely dedicated to Yuki, considering him more important than anything else in the world, yet he won't tell him of their relationship in Yuki's previous life. This is yet to be explained. It was during the last war that he changed sides to the Giou Clan, as he apparently made a binding "contract" with Yuki. Luka is a descendant of the "family of sinners" (Zess) and a topmost demon (opasts). As the only Crosszeria with a red Brand Zess, he is also known as "Bloody Cross". Luka battles with a large black sword that can use powerful magic and has a powerful Salamander dragon (Sodom) as his familiar. He was once the loyal dog for the demon king and used to drink his blood, that's why he is stronger than any Opasts. But he left his position after meeting Yuki. It was during the previous battle that Luka met Yuki and they fell in love. Luka promises he will stay with Yuki as long as Yuki wants him to. The manga suggests a bit of a darker history. Luka tells Yuki he was considered a slave because he was born into the "sinner" clan, Crosszeria, and that all the other Duras were intent on punishing the whole family and all its descendants for their ancestor's sin. The demon king owned Luka, and as a