Star Butterfly

Star Butterfly, also known as Star the Underestimated, is the main and titular protagonist of Star vs. the Forces of Evil. She is a teenage princess of the Kingdom of Mewni (located in another dimension) sent to Earth by her parents in order to learn how to use the royal magic wand, with supervision from Glossaryck.

In seasons 1-2, she lives with her Earth hosts, the Diaz family. In season 3, she returns home to Mewni. As of season 4, she lives in the Monster Temple following the destruction of Butterfly Castle. She was also the 37th Queen of Mewni for four days[11] before giving the kingdom to Eclipsa Butterfly.[44] As of "Doop-Doop", she is back to living on Earth. From "Here to Help" onward, she is Marco's girlfriend.

Personality
Star is a very friendly and energetic girl who loves having fun and usually has an optimistic outlook on life. She loves to help others and whenever she sees that someone is upset, she does her best to cheer them up. Strangers, in her eyes, are just friends she has not met yet, and she feels bad if she hurts someone's feelings, whether intentionally or not. Star has a happy-go-lucky attitude and always tries to put a smile on everyone's faces. She also works very hard towards her goals, so much so that she will sometimes end up greatly sleep-deprived, such as in "Monster Arm".

Owing to her rather sheltered upbringing, Star's optimism and enthusiasm can border on recklessness, to the point of endangering the people around her with her madcap antics. She has rather simplistic views on concepts such as leadership and responsibility, believing that prioritizing fun above all else matters the most. All this, coupled with her lack of understanding of Earth customs, often puts her and Marco in strange, dangerous situations. While rarely ever angry, she does express annoyance towards people who do not take her seriously or give her the attention she wants. Although she treats her friends kindly and rarely holds grudges against them, she is usually brutal towards her enemies.

In earlier episodes, she also holds a prejudice against monsters, believing they are "born bad", though this opinion softens a little as of "Mewnipendance Day". As the series continues her prejudice softens more and eventually dissipates completely, shown by her being friends with Buff Frog and his tadpoles and her disapproval of her mother's own prejudice in Star vs. the Forces of Evil: The Battle for Mewni. By "Starfari", Star has started advocating for fairer treatment of monsters in Mewni.

Because of her initial naivete and irresponsibility, Star shows several times to be incapable of being an effective ruler. In "Sleep Spells", it is revealed she is aware of this through her having issues with her mother and taking over for her one day. This is further insinuated when she is made acting queen in "Divide", during which she does not know what to do and constantly turns to others for advice. After discovering she is not a true member of the Butterfly family in "Butterfly Trap", Star begins to doubt her place as royalty. Because of these reasons, she ultimately feels compelled to return the royal magic wand to Eclipsa at the end of "Conquer".

As the series progresses, Star becomes less prone to resorting to magic to fix a situation, and she shows a willingness to become stronger and more serious and not run away from her problems, despite this sometimes resulting in her underestimating her enemies. After Toffee's defeat, she decides to focus on becoming a better princess and starts to act more serious, mature, and responsible as a result. She also hopes to bridge the relationship gap between Mewmans and monsters, wanting the prolonged discrimination between them to end one day. As of "The Tavern at the End of the Multiverse", after her mother's use of a magically-created army backfires horribly, Star outright hates magic, believing it only causes problems and that those who use it are "idiots". She even believes magic to be the cause of all of Mewni's problems and that destroying it will solve everything.

In season 4, Star demonstrates determination through her relentlessly searching for her missing mother all the while helping Eclipsa be accepted as queen over a period of several months. However, all of this puts a noticeable strain on her. By "Cornonation", Star cites she is tired of all the politics and just wants to return to being a normal teenage girl, further stating she had forgotten what exactly that means.

Early on, Star has somewhat of a nervous tic where she chews on the top of the wand.[49] She also has a habit of kicking in doors.

Appearance
Star's wardrobe consists of a wide variety of colors. She usually wears a red or magenta hairband with devil horns and lets her hair down, but she sometimes uses her magic wand to change into other hairstyles like pigtails or ponytails (and on one occasion, to change her hairband into other kinds of headgear). She worn a purple swimsuit with a star in the middle in "Beach Day".