Proclaiming herself as Zatch's girlfriend, Patie had been in love with him since she first encountered him fishing on a private beach in the Mamodo World. Her obsession drove her to seek any possible way to interact with him. Upon reaching the human world, she partnered with Uri, a man struggling to feed his family, under one condition: he would help her find Zatch, and she would assist him in return. When she finally located Zatch in Japan, Penny was devastated to learn about his lost memories, leading her to confront him violently, hoping either to jog his memory of their (one-sided) love or eliminate him from the tournament.
Zatch demonstrated his power against Penny, but she was saved by Byonko just before Zatch's Bao Zakeruga could hit her, allowing Uri to escape with both of them. Penny's affection for Zatch was so intense that even her panties featured his face. After escaping, she met Byonko's boss, the malevolent "Milordo-Z" (Zofis), who offered her a chance to control ancient Mamodos and win the tournament. Seeing this as an opportunity for revenge, Penny accepted the offer and led a squadron of Ancient Mamodos into battle. However, she soon realized that her new subordinates lacked free will and fighting abilities, causing her to doubt her choices.
When Zatch and his allies seemed hopeless against Demolt, one of the Four Supreme Mamodos, Penny and Byonko turned against their master. Penny destroyed the sustaining Moon Stone, aiding the enemy with her So Giaku while having her book burned. As she was sent back to the Mamodo World, her final wish was for Zatch and others to forgive and play with them upon their return, which they agreed to. During the King Festival Arc, Penny helped Zatch and Kiyo fight Clear Note. She was last seen at school with Byonko, coincidentally placed in the same class as Gash, whom she still harbored feelings for. After the Ancient Mamodo Arc, Uri found work as a chef and appeared again when Gash prepared to battle Clear, baking a cake shaped like Penny's hairstyle before she cut it off during her battle with Demolt, showing how much he missed her.
Spells:
- Akur: Sprays a jet of water from Penny's hand. (Attack)
- Ashield: Creates a shield made from water that can also absorb electrical attacks. (Defense)
- Aku Supureido: Rebounds the enemy's previously absorbed attack. (Attack)
- Akuruga: Fires a spiraling spray of water from her hand. (Attack)
- Oruda Kuran: Generates several large jets of water surrounding the opponent. (Attack)
- Akur Kiro: Produces slicing blades made from water. (Attack)
- Akurouk: Creates water-like claws on Penny's hands and feet; she can spin towards the enemy in this form. (Assist)
- Ganzu Akur: Throws spheres of water at high velocity. (Attack)
- So Giaku: Creates a huge dragon of water to attack the foe. This is Penny's strongest spell aside from the one in Zatch's Golden Spellbook. (Attack)
- Shin Suou Giakuru: A more powerful version of So Giaku, only seen in Zatch's Golden Book. (Attack)
(Source: Zatch Bell! Wiki, edited)
