Irvin

Irvin is a demon seal holder, which basically is a seal that gives him extreme fighting capabilities. He is also one of the strongest ones, holding the title of Chamberlain, being one of the guards to the Archdukes (the highest level of crest-holders). His movements are usually unseeable to the untrained eye. He becomes Siluca's guard after realizing her abilities when she was the only one who recognized danger from the Chaos that killed the two Archdukes.