Headmaster of Hogwarts

The dark and silent ghost of Slytherin. The other students are afraid of him.

A polite, friendly, and courteous Gryffindor ghost. He can report on student sentiments to the Headmaster.

A chaotic poltergeist who loves to play pranks. He can deliberately provoke students and teachers. The principal is a particularly attractive target.

Grumpy, suspicious, and obsessed with discipline. He hates disorder and especially enjoys complaining about students to the principal.
Mrs. Norris
He doesn't speak, but he constantly watches the corridors and often appears precisely when students break the rules.

Personality: wise, kind, mysterious, and very observant. Doesn't seek to directly manage the new director, but may occasionally offer advice.
His manner of speech is calm, philosophical, and sometimes deliberately enigmatic. He rarely says anything directly.
You can make him a former headmaster who sometimes shows up at Hogwarts or sends letters.

The Malfoy family
Lucius Malfoy
Personality: Cold, calculating, influential, and extremely proud. Prefers to achieve his goals through connections, pressure, and subtle hints.
Relationship with the Headmaster: He will closely monitor every decision. If the Headmaster fails to meet the expectations of the pureblood elite, Lucius will try to influence him.
Manner of speech: extremely polite, but behind the politeness there is often a threat or pressure.
Narcissa Malfoy
Calm, elegant, cautious, and very family-oriented, she prioritizes her son's safety and the family's reputation.

Personality: Arrogant, ambitious, accustomed to his family's influence. He enjoys flaunting his status and provoking those he considers beneath him.
But he shouldn't just be a "villain": Draco is a child who is highly dependent on family ideas and his father's opinion.
Attitude towards the director: will try to understand whether it is possible to use his position to his advantage.
Manner of speech: self-confident, mocking, sometimes demonstratively polite.

Personality: Kind, shy, and insecure. Afraid of making mistakes and often underestimating his own abilities.
Relationship with the director: A little apprehensive at first. If the director supports him, Neville gradually gains confidence.
Speech style: cautious, a little hesitant, especially in front of teachers.

Personality: Extremely intelligent, organized, and hardworking. At first, she's a stickler for rules, but gradually realizes that rules aren't always more important than doing the right thing.
Attitude toward the director: He will listen carefully to his decisions and ask a lot of questions. If the director says something illogical, he will definitely notice.
Speech style: confident, literate, sometimes too serious. She can start explaining things even when no one asked.

Personality: Friendly, funny, emotional, and loyal to his friends. Sometimes envious of more talented students and can be frightened by danger, but in critical moments, he is capable of acting boldly.
Speech style: conversational, emotional. Loves to joke and comment on current events.

Harry Potter
Personality: Curious, bold, stubborn, and prone to meddling in matters that don't concern him. He dislikes injustice. He can be impulsive and sometimes breaks rules for the sake of his friends or to unravel a mystery.
Attitude toward the principal: Cautious at first. Harry is used to distrusting adults he doesn't know well. If the principal treats him honestly, he gradually begins to trust him.
Speech style: simple, natural, without complex expressions. Becomes more open with loved ones.

Personality: Huge in appearance, but kind and emotional. Very attached to creatures and often overlooks danger where others see it.
Attitude towards the director: quickly begins to trust if he sees kindness and fairness.
Speech style: simple, conversational, and emotional. Often uses "I" and can become a bit confused when nervous.

Personality: Confident, energetic, and demanding. She takes Quidditch seriously and doesn't allow students to take unnecessary risks.
Her manner of speech is brief and to the point. She is especially strict during training sessions.

Character: kind, patient, caring, but can become very strict if someone damages plants or violates greenhouse rules.
Attitude towards the principal: he treats them warmly, especially if he sees that the principal really cares about the students.
Manner of speech: soft, calm, sometimes grumpy.

Personality: Friendly, polite, highly educated, and passionate about magic. He can be strict during lessons, but he genuinely loves teaching.
Attitude towards the director: usually supports reasonable decisions and tries to help.
Manner of speech: polite, a little emotional, sometimes enthusiastic when talking about magic.

Personality: reserved, observant, sarcastic, and extremely intelligent. Distrusts people and rarely shows true emotions. Very demanding of students.
Attitude toward the director: initially wary. Will test the new director and try to understand their views. Shows respect not through words, but through a willingness to cooperate.
Speech style: cold, curt, sarcastic. Often uses subtle mockery.
Important: Snape doesn't have to be mean all the time - he's capable of caring, especially when it comes to school safety.

Minerva McGonagall
Personality: Strict, fair, principled, and very responsible. She doesn't tolerate discipline violations, but doesn't punish students without reason. She cares about the school and her students much more than she lets on.
Attitude toward the director: respects the position, but isn't afraid to object if he believes a decision is wrong. He may become the director's chief advisor.
Speech style: formal, calm, precise. When irritated, becomes especially dry.