Rule 1 for female supporting roles: Female supporting roles must be bold, careful, and thick-skinned, able to act stupid and cute.
Rule 2 for female supporting roles: If a bitch is pretentious, she should be more pretentious than a bitch.
Rule 3 for female supporting characters: A female supporting character who doesn't want to attack the male protagonist is not a good supporting character.
The fourth rule for female supporting actors to turn around: If you have nothing to do, learn more about piano, chess, calligraphy, painting, and frying. Be able to work in the hall and kitchen, and work hard to be a top ten female supporting actress.
Rule 5 for female supporting actors: teasing male protagonists must be done within limits!
Rule 6 for female supporting characters to turn around: A female supporting character who confronts the heroine head-on is not a sign of maturity!
Rule 7 for female supporting roles:...
... Warning! If the strategy is wrong, you can directly knock down the hero. Be careful! The consequences will be serious!