Snape

Biodata

Feature	Information
Name	Severus Snape
Alias(es)	Slytherin Snake King
Gender	Male
Affiliation	Hogwarts School of Witchcraft and Wizardry; Slytherin House; Order of the Phoenix
Occupation/Role	Potions Professor; Head of Slytherin House; Potions Club mentor; double agent; later Headmaster of Hogwarts
Status	Active; Headmaster of Hogwarts after the war 581
First Appearance	Chapter 18: “Material Processing”

Power Progression

Stage / Realm / Level	Chapter	Notes
Connection to the Magic Web / Annihilation Rule	573	Reaches the final step toward connecting with the illusory Magic Web. His Annihilation Rule later prevents Salazar Slytherin’s severed remains from regenerating through Flesh and Blood Magic 573 578.

Background

Snape is a former Death Eater who served as Dumbledore’s embedded spy during Voldemort’s first rise. His intelligence work was instrumental in protecting Harry Potter and exposing Voldemort’s return, though this role remained hidden from most of the wizarding public for years 498.

He chose to teach at Hogwarts despite being invited to review articles for The Golden Cauldron, a position that could eventually have led to a Wizengamot seat. His decision reflects both his exceptional standing in Potions and his commitment to remaining at Hogwarts 67.

His hostility toward Harry is rooted in his resentment of James Potter, whom he regards as a schoolyard bully. Snape remains willing to protect Lily Evans’s son, but does not hide his contempt for James’s likeness in Harry 19.

Appearance

Snape is most often seen in black robes that billow dramatically as he moves through Hogwarts’ corridors. His hollow, unreadable eyes and severe expression contribute to his intimidating presence 18 139.

• Wears distinctive black robes.
• Has hollow, difficult-to-read eyes.
• Maintains an austere, cold-faced demeanor.
• Carries himself with deliberate, imposing movements.

Personality

Snape is stern, exacting, and famously sharp-tongued. He has little patience for carelessness, excuses, or students who neglect their studies, and regularly uses sarcasm to pressure Sean into completing research and essays 44 166 240.

His treatment of students is openly uneven: he favors capable Slytherins and frequently targets Gryffindors, particularly Harry. However, his harshness toward Sean often conceals genuine concern, such as when he warns Sean away from Harry’s dangerous adventures or scolds him after he is injured 39 44 65.

Snape is deeply loyal once he chooses to protect someone. He defends Sean against Dumbledore’s suspicions, risks Voldemort’s wrath by refusing to truly harm him, and develops a protective connection with the Bulstrode family after Sean leaves Britain 170 484 581.

Abilities & Skills

Potions Mastery

Snape is one of the wizarding world’s foremost Potioneers, capable of brewing advanced preparations, evaluating research, and identifying subtle flaws in ingredients and recipes.

• Was invited to become a reviewer for The Golden Cauldron due to his expertise 67.
• Brews Wolfsbane Potion for Remus Lupin despite his personal hatred of Lupin and Sirius Black 206.
• Uses Sean’s alternative ingredients in his Wolfsbane work and guides Sean through substitute-material research 206 212.
• Recognizes Sean’s exceptional talent, subjects him to advanced practical tests, and arranges publication of his work in The Golden Cauldron 59 60.
• Stabilizes Sirius Black with potions after Sirius arrives at Hogwarts critically injured 567.

Legilimency

Snape is an accomplished Legilimens who can conceal his own thoughts from other skilled mind-readers and perceive fragments of another person’s mental state.

• Successfully hides his observations from Dumbledore through deliberate mental control 144.
• Reads Lucius Malfoy’s fear and agitation through his advanced Legilimency during the Battle of Hogwarts 570.
• Recognizes that Sean’s unusual connection to Dumbledore’s concerns warrants vigilance, though he refuses to condemn Sean without proof 170.

Dueling and Cursework

Though primarily known for Potions, Snape is an exceptionally dangerous combat wizard with powerful defensive magic and advanced cursework.

• Created the Dark spell Sectumsempra while still a student 560.
• Fights the Lestrange brothers simultaneously atop the Astronomy Tower and gains the advantage through speed and spell volume 560.
• Deflects attacks and kills numerous werewolves during the Hogwarts invasion 565.
• Turns on Voldemort when ordered to kill Sean, using Sectumsempra to cut through the table between them and kill Old Crabbe 484.
• Confronts Voldemort directly during the final battle despite fearing him 565 567.

Annihilation Rule

After connecting to the Magic Web, Snape’s magic gains an annihilating quality that prevents supernatural regeneration.

• His Sectumsempra splits Salazar Slytherin’s body apart during the final confrontation 578.
• The Annihilation Rule embedded in his magic prevents the severed remains from reforming through Flesh and Blood Magic 578.

Relationships

• Sean Bulstrode — Snape’s most valued student and eventual protégé. He mentors Sean in Potions, sets demanding academic standards, protects him from danger, and later maintains ties with Sean’s family 27 60 170 581.
• Harry Potter — Snape resents Harry as James Potter’s son but continues to protect him because of Lily Evans. His reactions range from open hostility to reluctant intervention 19 147 498.
• Albus Dumbledore — Snape’s headmaster, handler, and wartime ally. Their relationship is marked by trust, strategic disagreement, and Snape’s growing readiness to challenge Dumbledore over Sean and Harry’s safety 170 555.
• Remus Lupin — A former school acquaintance toward whom Snape holds intense resentment. Despite this, Snape brews Wolfsbane Potion for Lupin 197 206.
• Sirius Black — Snape’s bitter enemy from his school years. Their mutual hostility persists even when they are forced to cooperate 347 397.
• Lucius Malfoy — A former associate and school-era friend whose bond with Snape weakens after Voldemort’s first fall 34.
• Lord Voldemort — Snape’s former master, who increasingly doubts his loyalty and orders him to kill Sean as a test. Snape ultimately betrays Voldemort openly 383 453 484.
• Cesar Bulstrode — Sean’s younger brother, whom Snape mentors after Sean leaves Britain. Cesar views Snape as a respected teacher and elder 581.

Story Role / Major Arcs

Early Hogwarts Years

Snape serves as Slytherin’s feared Head of House and Potions professor. He initially reacts with anger and regret when Sean Bulstrode is sorted into Slytherin, but quickly recognizes Sean’s aptitude and begins giving him special attention 13 18.

He publicly humiliates Harry during their first Potions lesson, then calls on Sean to answer the difficult questions Harry cannot answer. This establishes both his hostility toward Harry and his awareness of Sean’s talent 19 20.

Snape recruits Sean into a small Potions-focused group, gives him extensive reading lists, and guides his advancement as a researcher. He later encourages Sean’s Golden Cauldron publication and imposes a three-paper graduation requirement in exchange for access to potion ingredients 27 44 60 120.

Mentor to Sean Bulstrode

Snape repeatedly warns Sean against becoming involved in Harry’s dangerous affairs. After Sean is hurt during the Philosopher’s Stone incident, Snape’s furious reprimand is motivated by concern rather than dislike 44 65.

He credits Sean for defeating the Hogwarts troll, pushes him to act like a “calm and wise Slytherin,” and later defends Sean when Dumbledore becomes suspicious of his extraordinary ability 39 170.

Snape’s mentorship remains demanding. Even when Sean is hospitalized after killing the basilisk, Snape focuses on the student’s unfinished thesis and warns him not to let Slytherin politics interfere with his academic work 166.

Conflict with the Marauders

Snape’s hatred toward Lupin becomes apparent upon Lupin’s appointment as Defence Against the Dark Arts professor. He considers Lupin connected to the school bullying that shaped his resentment toward James and Sirius 197.

Despite that hostility, Snape continues brewing Wolfsbane Potion for Lupin. His resentment toward Sirius remains more direct and volatile, especially when Snape believes Sirius may threaten Sean 206 347.

Double-Agent Crisis

As Voldemort returns to power, Snape comes under pressure to prove his loyalty by killing Sean. He and Sean reduce their private meetings to avoid exposing their connection, and Snape even considers allowing Sean to seriously injure him to maintain his cover 453.

When Voldemort gives him the final order to kill Sean, Snape turns his wand on Voldemort instead, openly revealing his true allegiance 484.

Battle of Hogwarts and Aftermath

After Dumbledore is removed, Snape becomes Headmaster of Hogwarts while secretly operating under Voldemort’s scrutiny 453. During the invasion of Hogwarts, he duels the Lestrange brothers, battles werewolves, saves Sirius with potions, and confronts Voldemort directly 560 565 567.

In the final battle, Snape fights beside Sean and Dumbledore against Salazar Slytherin. His newly realized Annihilation Rule becomes crucial in preventing Slytherin’s body from regenerating 573 578.

Years after Sean’s departure, Snape remains Headmaster and becomes a strict but protective mentor to Cesar Bulstrode 581.

Notable Quotes

“Sean, don't get too close to the Savior if you don't want to die young.” 44

“Stupid dog, try touching him and see what happens!” 347

“We must hold out and wait for Sean to return!” 565