Bierrez

Bierrez (or Viaresu) is a youkai who is very loosely affiliated with Nadil's army. A rebel demon, Bierrez keeps his loyalties to himself and dislikes being told what to do, often masterminding his own schemes rather than following orders. Due to an encounter with the Dragon Lord's blood as a young youkai, Bierrez used to be the only youkai able to enter the Dragon castle. While pretending to retrieve Cesia for Nadil's army, Bierrez actually attacked the Dragon Castle single-handedly in order to rescue her (though she didn't know it and refused to leave). He has a very close attachment to Cesia, having known her for several years, always watching out for her from behind the scenes and protecting her from other youkai who want her powers. While he appears to simply be trying to better his own place in life, Bierrez actually puts a lot of effort into doing what he thinks is best for Cesia; ultimately, he asked Rath to kill him in order to protect her. At the time of his "death" in the fourth volume, Bierrez possessed the Red Dragon Gem and was the Red Dragon Officer candidate. When Rath "killed" him, he absorbed the Red Dragon Gem. When revived by Cesia in volume 21, Bierrez agreed to become the Red Dragon Officer. He now refers to himself as a Dragon rather than as a yokai. Also Fedelta's younger brother. (Source: Wikipedia)