Zu tries more than anything to view the world from a perspective that her simple mind will never allow. It is also pretty easy to hurt her feelings this way, she takes everything seriously She's always speaking and acting from her heart, she almost never lies and would never do anything to harm other people or other living creatures. It's easy to make her happy, but she is also easily upset and quite gullible. If she cannot find a solution to stress-inducing or important situations, she will break down and cry. But if she runs into trouble, she often won't know what to do. She's normally a very happy girl, full of hope and joy.

Her IQ is very low because of this, she has problems with things like simple math, reading, telling time and other such things. 'Zu' is a human with cat features that suffers from a mental disorder, which restricts her thought processes to that of a child.