Is the opposite of purple MSI a twin flame?

No, Chinese violet and twin flame are two terms closely related to China culture. Purple MSI is a deity in China culture and an important tool for ancient astronomers to observe astronomical phenomena. It is regarded as an auspicious star. Twin flame is a concept in western culture, which refers to the close connection between two souls, and there is no necessary connection between them, so the opposite of Chinese purple star is not twin flame.