Snape

Biodata

Feature	Details
Name	Severus Snape 12
Species/Race	Wizard 46
Gender	Male 12
Affiliation	Hogwarts; Slytherin House 22 43
Occupation/Role	Head of Slytherin House; Potions professor; temporary Defense Against the Dark Arts instructor; occasional Quidditch referee 22 83 128
First Appearance	Chapter 12 12

Background / History

Snape was formerly one of Voldemort's most capable followers, but now hates Voldemort and desires to kill him. He regards himself as both “the shame of the Prince Family” and a Death Eater, believing pure-blood circles would never truly accept him. 12 56 126

As Slytherin's Head of House, Snape reacts with immediate suspicion when a new student named Tom Riddle is sorted into Slytherin almost instantly. He fears that Tom may be Voldemort reincarnated or connected to him through Dark magic, especially after seeing the boy's rapid growth and extreme compatibility with Slytherin. 12 13 46

Dumbledore repeatedly instructs Snape to guide Tom rather than condemn him based on suspicion. Snape reluctantly agrees, though he continues monitoring Tom's behavior and reporting his concerns to Dumbledore. 46 48

Snape also investigates Quirrell, correctly suspecting that he serves Voldemort and is targeting the object retrieved from Gringotts. 48

Appearance

Snape is usually seen in black robes and projects an oppressive, intimidating presence in the classroom. His office is dimly lit and filled with pungent herbs, potions, preserved organs, and ingredient cabinets. 22 26

• Black robes that billow as he walks. 26
• Stern face and cold, hostile gaze. 22 27
• Greasy-looking hair, which Tom finds particularly unpleasant. 27
• Frequently described as looking darker or more severe when angered. 42 77

Personality

Snape is sarcastic, severe, and easily provoked, particularly by Harry Potter, Tom Riddle, and challenges to his authority. He regularly humiliates Harry and Ron in class, deducts points from rival Houses, and takes visible satisfaction in their discomfort. 27 83 84

Despite his hostility, Snape takes teaching seriously. He answers questions from students who genuinely seek knowledge, values skill over bloodline, and refuses to compromise potion safety even during a school-wide emergency. 43 55 272

He respects ambition, combat ability, and practical magical talent. Tom's victories over older Slytherins initially infuriate Snape, but he ultimately establishes the Shadow Prefect challenge so authority in Slytherin can be earned through merit rather than pedigree. 43 44

Snape is deeply competitive. Tom's rapid growth, possession of phoenix materials, and repeated success in duels drive Snape to train and research more intensely rather than accept being surpassed by a student. 119 121

Abilities & Skills

Potion-Making

Snape is an accomplished potioneer with extensive stores of rare ingredients and a strong interest in improving formulas. 23 72

• Teaches Potions as “the subtle science and exact art of potion-making.” 27
• Improves otherwise “useless” potions and possesses advanced formula notes. 138
• Reviews Tom's Strengthening Potion research and successfully validates an extraction method that improves absorption and efficacy. 126 128
• Prepares the Mandrake Restorative Draught for the victims of the Chamber of Secrets crisis, estimating that the process requires at least three days. 272
• Becomes susceptible to Tom's bargaining when offered rare potion ingredients, such as Whomping Willow materials and Thunderbird feathers. 213

Dueling and Dark Magic

Snape is a battle-hardened duelist whose reflexes and magical output greatly exceed those of an ordinary professor. 95 96

• Reacts quickly enough to shield himself from Tom's opening lightning attack during their first duel. 95
• Uses black flames that can become smoke, daggers, or a snake-like construct. 95 120
• Combines Transfiguration and offensive magic, turning grass into constricting snakes while attacking Tom with a flaming transfigured goalpost. 96
• Can split his focus between multiple spells and maintains strong battlefield mobility despite Tom initially viewing him as a stationary combatant. 96
• His Dark magic is vulnerable to the Patronus Charm's positive energy, which Tom uses to dissolve his black smoke. 95

Transfiguration

Snape demonstrates advanced practical Transfiguration in combat. 95 96

• Transfigures earth into armor to block a swarm of magical daggers. 95
• Alters a Weather Spell into streams of black flame. 95
• Creates and controls numerous snake constructs from the Quidditch pitch's grass. 96

Teaching and House Discipline

Snape runs Slytherin through a combination of strict rules, dueling standards, and personal authority. 43 208

• Serves as referee for the Slytherin prefect challenges, forbidding Unforgivable Curses and uncontrolled Dark magic while offering to heal injuries. 43
• Recognizes Tom's Shadow Prefect system as a means of imposing order within Slytherin, even if he does not create it himself. 44 208
• Other professors seek his advice after observing Slytherin's unusual discipline under Tom's influence. 208
• Substitutes for Quirrell in Defense Against the Dark Arts and teaches the Ghoul-Banishing Charm through live practice. 83 84

Equipment / Resources

• Wand — used for potion instruction, Transfiguration, defensive barriers, and high-level dueling. 27 95 96
• Potion office and ingredient stores — contains rare and high-tier magical materials, including ingredients later stolen by Tom. 23 72
• Potion research notes and improved formulas — traded or discussed with Tom in exchange for magical spells. 138

Relationships

• Albus Dumbledore — colleague and headmaster. Dumbledore repeatedly restrains Snape's suspicion of Tom and assigns him to monitor Quirrell. 48
• Tom Riddle — initially a suspected threat and disciplinary problem; later becomes Snape's student, sparring partner, research collaborator, and rival. Snape concedes after Tom's dragon-bloodline enhancement overwhelms him in their second duel. 22 95 121 126
• Harry Potter — openly hostile toward Harry, whom Snape repeatedly mocks, penalizes, and targets in class. 27 84 138
• Voldemort — Snape's former master and current object of hatred; Snape wants to kill him. 12 56
• Quirinus Quirrell — Snape suspects Quirrell of serving Voldemort and watches him closely around the Philosopher's Stone plot. 48 77
• Gilderoy Lockhart — Snape wants the Defense Against the Dark Arts post and is displeased by Dumbledore's decision to hire Lockhart instead. 226
• Greengrass Family — Snape recognizes the family's exceptional power and warns Tom that even Voldemort would avoid provoking them. 126

Story Role / Major Arcs

Suspicion of Tom Riddle

Snape immediately distrusts Tom because of his name, extraordinary Slytherin sorting, magical talent, and resemblance to Voldemort. His attempts to discipline Tom over the dormitory fight fail when Tom uses Snape's past use of the word “Mudblood” against him. 12 13 22

Shadow Prefect Challenge

After Tom defeats sixth-year prefect Avery, Snape formalizes the “invisible prefect” position and expands the challenge to all Slytherin prefects. Though angered by Tom's provocation, Snape understands that Tom is establishing authority through strength. 43 44

Quirrell Investigation

Snape reports his suspicions about Quirrell to Dumbledore and investigates the professor's connection to Voldemort and the Philosopher's Stone. Tom's theft of Snape's ingredients is instead blamed on Quirrell, intensifying Snape's scrutiny of him. 48 72 77

Duels with Tom

Snape accepts Tom's challenge before the winter holiday and proves decisively stronger, exposing Tom's tendency to prioritize elegant counters over directly defeating an opponent. 94 95 96

After Tom assimilates a dragon bloodline, their next duel reverses the outcome: Tom's increased spell power and physical ability force Snape to concede. Snape responds by recommitting himself to magical research and self-improvement. 120 121

Potion Research and the Chamber Crisis

Snape evaluates Tom's Strengthening Potion thesis, validates an improved extraction method, and warns him about the Greengrass Family's influence. 126 128

During the Chamber of Secrets crisis, Snape professionally prepares the Mandrake Restorative Draught while suspecting Ross Wilkinson and questioning Tom about the culprit. 272 273

Notable Quotes

“You are here to learn the subtle science and exact art of potion-making.” 27

“Potions are a rigorous discipline, not roadside fast food.” 272

“You are his Head of House and his professor; your job is to guide him, not to harbor suspicions against him.” — Dumbledore to Snape 48