He is a powerful magician in Rave Master franchise.
He is a magician from Mildea who is very ambitious to become strong and control the Stellar Memories. Haja is the leader of the Oracion Seis who does not use Dark Bring but magic.
He first appears in this arc with his fellow Oracion Seis members on Jegan's black dragon. Haja orders his team to kill Elie since Lucia invoke Elie's Etherion with his kiss. Throughout the battle, he merely watches his team beat Haru's group. Although he thinks this is a waste of time, he looks down on Haru's group. He is one who talks about the solar eclipse and it's meaning. After Elie's Etherion occurs when Julius cuts Griffon in half, Haja notices the mark on Elie's shoulder is the Symphonia crest. When Haru defeats the Oracion Seis in a rage, Haja strikes Haru from behind. He tells his team to finish off Haru and Elie. However, Sieg Hart appears and blast them with magic. Haja is not fazed by Sieg Hart since he notices Sieg Hart's Heavenly Magic Circle. According to Haja, Sieg Hart uses this circle to boost his magic attack. Haru and the others rise up to protect Elie because of their vows. Haja neutralizes Musica and Let's attack. Haru attacks Haja, but Haja underestimate Haru. Haja learns that Sieg Hart use magic to boost Haru's attack. With Sieg Hart assisting them, Haja declares his team to retreat since he cannot afford to lose his members.
Back at Demon Card, Haja finds Lucia Raregroove in King's throne room. Upon recognizing him, Haja opens the box and presents King's Decalogue sword. He bows down before Lucia, the heir to the Raregroove kingdom and Demon Card.