As a member of Lugnica's nobility, Julius acts in a proper fashion, always having an air of nobility and conviction. He is also considerate and doesn't forget to show care toward others. He also shows a strict side, giving out accurate assessments of others whether they're good or bad, which is a result to his upbringing as an elite, and in actuality he believes that he and others can do better than they currently are.
Julis doesn't like those who forget their place, leading him to have bad relations with Subaru for a while. While both have apologized to each other after the battle with the Hakugei, Subaru told him he still hated him, with Julius stating that he didn't think they could be friends.
Currently, Julius has had his name "eaten" by Roy Alphard, effectively erasing his existence from the world.