Well, in some fanfictions that depict Rias as a spoiled brat, they might show her using her status and power to get what she wants in the Highschool DxD universe. For example, she could be overly demanding with her peerage members.
One plot could be that Rias tries to control all the events in the school's Rating Game without considering her teammates' opinions, just because she thinks she knows best as a spoiled brat. She might ignore their strategies and force her own, leading to problems in the team.
One reason could be extreme disobedience. For example, if the brat is told not to do something dangerous like running into the street, but does it anyway. Another reason might be excessive rudeness, like using bad language towards adults.
Once there was a little boy who was used to getting whatever he wanted. One day, he threw a huge tantrum in the store when his mother refused to buy him a new toy. At home, his father decided it was enough and gave him his first spanking. The boy was shocked at first but then realized his behavior was unacceptable.
First, consider the role the OC will play. If it's a partner for Genos, think about their combat abilities. For example, if Genos is mainly a physical fighter, the OC could be a support with long - range attacks or healing powers.
I don't know which web novel 'cold and handsome brat' is referring to. Can you provide more context or information so that I can better answer your question?
" Spoiled " was a thrilling light novel with ups and downs. It told the story of a female doctor in a small mountain village, Su Yan, who had picked up a fool, and this fool called her his wife. At the same time, the Emperor in Chang 'an learned that his Prime Minister had gone to a small mountain village to pretend to be a fool in order to get a wife. The latest chapter of this novel was chapter 139.
It could be a rival. Rivals in fanfictions often use insults to put down the main character. So, it might be someone who is competing with Bella for something, like a love interest or a position in a group.