The Zoroastrian Yazata of divine justice. He is the just judge where he judges the souls of the dead alongside Mithra and Sraosha. He weighs the good and bad of a person regardless of their status in life previously.
Rashnu is sent by Flame Apostle to deal with Akira and test his Dark Powers. He plans to see whether he will be a problem for their world Muspelheim. Silence is the only thing that is heard after he is defeated and dies. Resurrected after Akira defeats Shugoshin at the end of the story, he resides in the Huge Floodgate of Tenkai.