Arriving at Hogwarts on the first day of school, the principal Albus Dumbledore gave a speech about fellowship, the courage, the wisdom, and pride as values of the four houses of the school; also, He spoke about the House Cup and the rules of the College, then He took the opportunity to announce the new Defense Against the Dark Arts professor, Edward Mannock, who replaced Professor Betty Lynch because she contracted pink pox. During the traditional activity of the sorting hat with the students of first year, they call Rodrick Henrich and when put the hat on his head It comments “Hufflepuff could be since I feel a strong loyalty towards yours, you also have a thirst for knowledge and a lot of courage… but… yeah, I already decided, in that particular house you can achieve greatness… Slytherin!”, immediately all the Slytherin students applaud as the boy sits at their table, a 6th year student with platinum blonde hair welcomes him “You will see that you arrived at the best House, if you get together with the right people you will be outstanding, my name is Lucius Malfoy and I can help you achieve your ambitions”, Rodrick ignored him turning his head without saying any word because he had no intention of making friends, that created a tension at the Slytherin table which Lucius cleverly managed, Malfoy appeased the spirits of those who wanted to reproach the new first year student for his arrogance; Lucius was upset by the rudeness, but He decided to wait for a better place and time to work things out.

During potions class in conjunction with Gryffindor, Professor Horace Slughorn who was also Head of Slytherin House looked extremely friendly and energetic asking questions while a Slytherin boy named Severus Snape stood out in the class answering all the questions, a silent Rodrick Henrich wasted time in what he considered a boring class and the popular Gryffindor boy tried to make himself the center of attention by throwing paper balls to Snape whenever Horace wasn't looking. Then Professor Slughorn realized something was up and decided to put the troublesome boy's knowledge to the test.

Slughorn: Although perhaps some of you have come to Hogwarts with the confidence of knowing everything and not paying attention like Mr. Henrich, what I dislike the most is when someone comes with the intention of becoming a celebrity without making merits during my class. Mr. Potter, what would I get if I added asphodel roots to an infusion of wormwood?

Potter: I don't know sir.

Slughorn: Does not you know it? Then tell me, where would you go if You must look for a bezoar?

Potter: I don't know either, sir.

Slughorn: You don't know either? Let's have another try, what is the difference between aconite and luparia?

Potter: I don't know either, sir.

Slughorn: What a pity! I tried to help you, Mr. Potter, I'll have to deduct a point from Gryffindor for your misbehavior.

Potter: It's a shame You didn't ask Severus that so He can brag about being the insufferable know-it-all He really is (Potter's friends laughed and Rodrick interrupted)

Henrich: Asphodel and wormwood produce a sleeping potion so powerful It is known as the Undead Potion. A bezoar is a stone taken from the stomach of a goat and It serves to save you from most poisons. Aconite and luparia are the same plant. Well, any idiot with even the slightest knowledge of potions would know that (the whole class was silent) Or at least I'm sure any mediocre Durmstrang student would know.

Slughorn: Although he answered off the mark, Mr. Henrich is correct and I'm glad He's finally part of the class, 10 points to Slytherin.

Professor Horace Slughorn had the class mix up a simple potion to cure boils, those who could make the high-quality potion would be rewarded by being invited to the welcome dinner for outstanding students that Horace organizes at the beginning of each school year, Hogwarts students and teachers know that Mr. Slughorn has a Club of Eminences made up of the best potionists in the school's student body. Reviewing the results of the class, the professor announced that Miss Lilly Evans from Gryffindor, Miss Celestia Gaunt, and Mr. Severus Snape and Mr. Rodrick Henrich from Slytherin would be invited to the welcome dinner.

Later in Transfigurations classes with Professor Minerva McGonagall, Rodrick would take the opportunity to demonstrate his advanced performance above the other Slytherin students and those of Ravenclaw with whom they shared said class, then He hurled another insult at the Hogwarts students "I'm sure in Durmstrang the first year’s students already learn animagia, while here these babies have a hard time shrinking a simple cauldron".

Then in Care of Magical Creatures Classes with Professor Silvanus Kettleburn, Rodrick would take the opportunity to continue sticking his finger in the sore spot of the already tired Slytherin classmates and the Hufflepuff students, “While Hogwarts frightens are afraid of creatures painted on paper, in Durmstrang they are sure to bring the matter with real magical creatures”.

Already in Charms class together with Gryffindor, Professor Filius Flitwick taught them the charm “Wingardium Leviosa”, Celestia Gaunt was having serious difficulties while mispronouncing the spell and Rodrick who hadn't done anything yet took the opportunity to generate more displeasure.

Henrich: Stop it troglodyte, so you'll poke someone's eye out, besides you're pronouncing it incorrectly, you do it as if you had the wand stuck in your throat.

Gaunt: Really! Since you're such an expert, why don't you show us how they would do it in Durmstrang? So far you have done nothing but look like a goofy and criticize.

Henrich: Well, I didn't want to humiliate you too much in this class because you guys do it on your own, but if you insist, I think I'll have to show you (Henrich places his wand on the table and without saying a spell with just the movement of his fingers the wand begins to levitate). Do you see, you stupid ugly girl? I have been doing this since I was just a few months old.

Gaunt: Stupid ugly girl your mother for bringing you into the world! (Celestia didn't think what she said, she got carried away by the anger of the moment for how Rodrick had humiliated her)

Rodrick Henrich, who only last year saw his beloved mother being murdered in front of his eyes, changed his mocking gaze to one full of fury and desire to harm, Rodrick took his wand and conjured “avis”, immediately a lot of birds entered the class and began to peck Celestia.

Flitwick: “Finite” (stopped Rodrick's spell), Miss Evans, please escort Miss Gaunt to the hospital wing for care; I'll deducted 10 points from Slytherin for the show they just gave us, and Mr. Henrich will come with me to the principal’s office to visit Mr. Dumbledore. Please keep practicing “Wingardium Leviosa” while I come back.

Lilly and Celestia went to the infirmary, Rodrick and Professor Filius Flitwick headed off to the principal's office, then James Potter and his friends seized Severus Snape and hung him by his legs from the window.

Snape: Leave me alone, please, I haven't done anything to you.

Potter: Come on Severus, we are just playing, don't be a crybaby and stop complaining about nothing.

Snape: I don't want to play, stop it.

Black: But we want to play, don’t we guys?

Lupin y Pettigrew: Yes, it's very funny (between laughs, but in that moment, Lilly returns to the classroom)

Evans: What are you doing!? Leave Severus, it seems that the Rodrick’s idiocy has rubbed off on you all (So James and the others left Severus alone for the rest of the class)

That day Rodrick Henrich received a reprimand from the principal Dumbledore and He decided not to go to the dinner offered by Professor Slughorn because he had no interest in socializing, Celestia Gaunt only had minor scratches and the following days the trend was repeated, Rodrick took every opportunity to humiliate to Hogwarts students and comparing their to Durmstrang, Celestia arguing with Rodrick, James Potter and his friends teasing Severus Snape, and Lilly Evans defending him; until the Christmas holidays arrived and each student went to their home.