Venus's personality is hard to categorize as, in different forms of fiction, she seems to have different personas that are, for lack of a better term, rather contrasting.
Sometimes, Venus will be described as chaotic, "loud and in your face". Being an avid party animal, Venus has the energy to use and give, and, along with her punk style, she can be fun-loving and act rather crazy.
However, in most fiction, Venus is a down-to-earth girl, kind and whole-hearted, who lives a peaceful high school life. That being said, she retains just as much energy as her other persona, almost always in a hurry about the things she is passionate about, occasionally using terms like 'ASAP' to demand speed. However, she is commonly shown to just be a girl that sticks to herself and rarely shows emotion.
However, if there is one thing that remains constant between her two personas, it has to be her love for nature. Venus is extremely devoted to saving the environment, particularly the flora, and she gets extremely passionate about this. She finds what humans and fellow monsters do to the world intolerable and hates that she rarely sees others trying to save it. Since nature is her home, she will go to great lengths to try and save it as a plant monster. She can usually be seen handing out flyers or organizing eco-friendly activities. However, she has few qualms about using her pollen of persuasion powers (see Abilities section)to control people to do small things like sort trash and tend to the school's flora. Because of this, fellow students are careful around her and at times avoid her. Venus is not always aware of this, and when she is, she is more sad than sorry. She feels her fellow students have a general disregard for the well-being of monsters like her, and this feeling is what made her take matters into her own hands in the first place.