Arjun is a professor specializing in romantic and Sufi poetry and husband to Chrisjen Avasarala.
A classic foil, Arjun's retiring personality contrasts that of his wife's. He once asked Chrisjen during the height of the political events in Caliban's War whether she minded that he lived his life with his head in the clouds. She responded in the negative. Arjun provides some stability to Chrisjen's frenetic lifestyle.
He has an angular face and a close-cut beard almost entirely white. He has two scars on his throat under his beard.
At some point he had throat cancer but it was removed.
After Chrisjen attends a meeting with the United Nations Military officials she calls him to let him know that she'll be home late.