Episode Title: "A Kind Mamodo, Kolulu"
Description: A sobbing Mamodo named Kolulu on a rain-slicked sidewalk draws the condolences of a teenage girl named Lori, who brings her home believing that she is a street urchin. The two immediately form a close bond. Later on, Kolulu meets and recognizes Zatch, who is unfamiliar with her due to his amnesia. On that day, Lori finds Kolulu's spellbook and inquisitively reads the line "Zeruk," inadvertently transforming her into an impetuous fiend that causes a vehicle pileup. Horrified, Lori pacifies the Mamodo, who reverts to her normal self as the spell expires. The next day, Lori reads out the spell again to save Kolulu from being run over by a truck. Kiyo and Zatch, who were reconnoitering the scene nearby after watching the news about the incident, witness this and engage them in a battle. Zatch, however, notices Lori and Kolulu shedding tears and takes pity; from this, Lori realizes that they are not a threat and barely stops Kolulu from killing Zatch. Kolulu changes back and, realizing what had happened, divulges that she was obtrusively conditioned to fight in the Mamodo tournament. On Kolulu's request, Kiyo burns her book to remove her from the tournament, while Zatch sorrowfully promises to become a "benevolent" king and prevent what became of her from befalling anyone again.
Zatch Bell Season 1 Episode 8