Quiche is a carefree, playful, clever, optimistic, and a rather open-minded person, although this is somewhat hidden by his blood-lustful intentions for humans. He enjoys torturing Ichigo Momomiya, his main enemy, whom he likes seeing in pain. He harasses her regularly and gives her nicknames like "honey", "kitty-cat", and "sweetie-pie".

He has a rather cruel sense of humor, playing with his opponents for his amusement. He is very sadistic and enjoys seeing humans in pain, both physically and mentally. He is seen as a bit fun-loving, such as when he tries to make sure that everything that goes his way amuses him. An example: considering his enemies his toys.

Quiche is also intelligent, seeing as how when he makes any mistake, he will find a way to make it benefit him. Quiche is very possessive over anything of his, and that includes people. He has a temper and he doesn't have much control when angered. He would even attack one of his comrades out of sheer annoyance at times. Even with his rather cruel personality traits, he does the things he does for his goal of helping his people, his friends, and his family.

Quiche hates humans for what they have done to the Earth, and would take immense pleasure in killing them. He is cruel and rather a figure of danger to strangers, but he can't help but be a happy, optimistic figure to the people he is close to. Quiche trusts very few people, seeing as how he hates all humans its only natural he only trusts (sometimes barely) his teammates Pie and Tart. He doesn't trust Deep Blue very much, despite Deep Blue's claims that his intentions are in their best interests. He sometimes wonders if Deep Blue is even trustworthy of saving their planet, and is more confident in his own orders because of this.