Justinian is a planetar, the second most powerful in the ranks of aasimon, celestials, and angels in the Planescape setting. Planetars rank above all other celestials except solars.
In my upcoming comic, Metamorphosis, Justinian serves as a foil and a moderately antagonistic figure in Lasc's fight to rise above his evil nature and become good. Though not a major character in the overall story, the planetar will play a large part in Lasc's struggle for redemption.
Planetars are recognizable by their emerald skin and hairless bodies. As aasimon, they possess a majesty and presence awes many lesser beings. They are eager to fight evil wherever they see it and often wade directly into battle despite having a large array of magical and angelic powers.
Planetars © Wizards of the Coast open source gaming
Justinian & Artwork © Micah Weltsch