Becoming a successful unicorn girl requires that you have certain qualities such as open-mindedness, confidence, and comfortability with non-monogamy and polyamory relationships. You should also be comfortable with communicating your boundaries before trying out any type of relationship or sexual activity with another person/couple because this will help ensure everyone involved has a safe and enjoyable experience.
Lastly, it helps if you have good communication skills so that you can effectively discuss any issues that may arise during your encounters with couples in order to avoid any conflicts or misunderstandings later on down the line.