ESTPs are notorious flirts and highly competitive, hence Ginny's epic success in both sports and high school dating.
He cares about others, but isn't always stellar at accessing his feelings, and he prefers to learn by Hagrid is a classic ISFP: loving, loyal, and a tad on the sensitive side.
He values his privacy (especially about his parentage), sticks to his principles, and doesn't like to be boxed in by societal conventions.
Molly can be a bit of a traditionalist, sure, and sometimes just a smidge overbearing, but she loves fiercely like the ESFJ she is. It's just that the ENTJ type is all about ambition, leadership, and borderline-ruthless rationality.
She feels the urge to be helpful in every situation, she's always the one planning the party, and she has an enormous capacity for empathy (unless you're the unlucky Death Eater who threatens her kids). An ENTJ will crush their enemies and reward their friends handsomely.
Harry may be the most famous baby in all of wizarding history, but he doesn't actually love the limelight all that much.
He's an ISTP: introverted, independent, adventurous, and not too hung up on following the rules.
We all know that your Myers-Briggs type can unlock the secrets of who you should date and what kind of animal you should identify with, but now it can decide your role at Hogwarts, too. If you don't know your official Myers-Briggs personality type, go ahead and take the quiz. The I and E stand for introverted and extroverted, respectively (if you've been to the internet before, you already know what those two words mean).
So those four letters determine where you fall on four different spectrums.
Thirdly, you've got F for feeling or T for thinking when it comes to decision-making.
Then there's S for sensing, which means using your senses to gather information, and N for intuiting, which means adding to information with your innate intuition.
Luna is a dreamy, introverted idealist, like any true INFP.