Known for his ruthlessness, he was responsible for much growth in the kingdom, but they were largely due to his many war campaigns. It was during this time that he authorized the creation of the Anti-Skullgirl Labs. However, his war efforts were put to an end when his wife became the Skullgirl. Although he was also responsible for the Labs' decommissioning, they were restarted in secret after his disappearance.
- Some dialogue implies that the people of Canopy do not have a high opinion of him and his tyranny. For instance, in Eliza's story mode when Squigly voices distress and embarrassment over getting into a fight with the princess, Leviathan responds, "If she turned out anything like her father, I would not worry about it."
- Early concept art had him originally wielding Todd, before their appearances in Skullgirls Mobile confirming Todd was instead wielded by Nancy.