Many people often find Dr. MEI to be incredibly serious, calculating, emotionless and ruthless. This makes her capable of creating plans in a short time but these traits can bring a lot of conflict between those who don't know her very well or those who aren't close to her and can be almost mistook for paranoia.

MEI used to argue with Fu Hua a lot due to the fact she gave an order to Kevin Kaslana to kill former Squad V leader HIMEKO after she gained control of herself. She is focused on goals