Nisdi was very ambitious and constantly seeking out stimulation in the form of goals and achievements. He worked hard to become strong and dependable, but he eventually got bored of doing anything that wasn't harder and more daring than what he did before. He wanted to be the best, unable to be walked over without a fight, but not for any need for power or respect. Really, he was fine even if he wasn't the best at everything- but he sure would be aggressive toward anyone above him. All because he enjoyed a challenge and wanted something to work toward for his own entertainment. Sometimes that something to work toward was just other demons.

At some point, he was chosen to work with the king of his realm and basically be his right hand in political and ruling matters. He didn't like the king much from the very start, finding his strangely unnatural, yet strong, abilities uncomfortable to be around all day. He decided to fill his time by figuring out how to destroy him. Nisdi's planning and research took away some of his attention from all that steward stuff, but his fun and growth was more important than that, of course. Otherwise, he did tend to get along with others (as far as he was aware) and he worked hard at anything he did (as long as he was doing it). He's observant and clear-minded, and able to tackle any surprises that came his way with poise and tact. At least when it didn't involve his older sister, who still treated him like a kid and didn't seem to take him seriously. The two things that really got under his skin. In those cases, he would lose all his filters and go off. Luckily, no one else was brave enough to try it, and he cared too much about his sister to actually hurt her. Which is why she didn't shy away from aggravating him every time she visited.