Naomi is once of Zatch's bullies in the park that she always grits her teeth. Gash is extremely frightened of Naomi because she is scary and he cannot use spells to defeat her. Even though Naomi is always mean to Gash, he geniunely cares about her, even attempting to save her from a lion at one point. One Naomi's noticeable attributes is her car. She drives a red toy car for one that has a picture of a man and a woman kissing on the front.
Naomi loves to mess around with Zatch, for example she one time made him follow her as she bought things to bully him.
Source: ZatchBell Wiki