My question involves labor and employment law for the state of: California

As part of our employee handbook, there's a clause that states no relatives can be hired to work for our company. Our corporate office and two other plant locations are established in California, and another branch in North Carolina. The first sentence in mind, our North Carolina plant recently hired a couple, a Caucasian woman who would oversee the who plant food safety program and all departments beneath her, and her husband (African American) in the shipping department. In our California plant, we hired my sister to implement this same program for our other location in CA, and the President questioned her hiring, because she is my sister (Hispanic), yet she wouldn't be under my department nor my branch. He began to discuss the employee handbook, yet he let the hiring of many family members in the North Carolina plant, as well as more family members directly hired by the administrative director rather than the production director. Also, he harasses all employees by micromanaging, which causes me anxiety, and he continually has a paranoia that we have some secret agenda. This president started with the company since April of last year, and will serve a 5 year term and then will be sent back to Japan. He also has a secretary (Caucasian), that before he started, she was on board, but comes late everyday, even to date! I told him that she comes late and all he could say was say that she makes reports for him and was okay, but if it were me there would be a problem. Also, if he was to go by the handbook, then she would have been terminated months ago, since she comes late literally everyday.

Can someone give me some advice, and if there's anything I can do to prevent the President from denying her employment with the company, even after she has officially been employed but doesn't start until two weeks time?
Thank you!