Zeri was actually warned by the teacher that if she wanted a peaceful life in this school, she would never even think about offending that person. The teachers knew that she was no rich kid and that she was only able to attend this school because of her scholarship, so her teacher told her to avoid trouble since it would be really easy for that person to kick her out if he wanted to.
The teacher even urged her to apologize which made Zeri clench her fists. She never thought that even her teacher seemed to be afraid of him. Even if that Android was the owner of this school, apologizing to him when this was his fault was absurd!