Snape

Biodata

Feature	Information
Name	Severus Snape
Species/Race	Wizard
Gender	Male
Affiliation	Hogwarts; Death Eaters; later operates as a double agent and engages with the Observer faction
Occupation/Role	Potions Professor; Head of Slytherin House; Defense Against the Dark Arts tutor
First Appearance	Chapter 31

Background

Snape and Lily Evans were childhood neighbors, born in the same year; Snape was 21 days older. They attended Hogwarts together, where Lily entered Gryffindor and Snape entered Slytherin. His friendship with Lily later collapsed, and he was bullied by Potter and his friends during his school years. 123

During his Hogwarts years, Snape created the Dark Curse Sectumsempra, which carries an “Unrecoverable” effect. He also developed exceptional Legilimency and Occlumency, allowing him to conceal much of his mind even from Dumbledore. 48 123

Snape became a Death Eater but sought Dumbledore’s help before Voldemort’s fall after overhearing a prophecy connected to Lily and Harry Potter. He retained his devotion to Lily’s memory and later made Harry’s safety his primary condition in dealings with both Voldemort and Dumbledore. 181 247 291

Appearance

Snape is commonly seen in plain black wizarding robes, with long, greasy hair and an intensely vacant or hollow gaze. His appearance is frequently described as severe and unwelcoming. 114 123 126

• Long, often greasy black hair. 126
• Dark, deep-set eyes; his irises are described as tea-colored. 31 123
• Typically wears simple black robes. 179
• Keeps his wand within a compact triangular zone before his chest while dueling. 75 184

Personality

Snape is solitary, guarded, and sharply spoken. He avoids friendship even when Voldemort attempts to improve their relationship, and he reacts with hostility when others intrude on his work or question his loyalty. 114 121

His loyalties are deliberately difficult to read. Resentful of manipulation by both Dumbledore and Voldemort, Snape ultimately declares that he belongs fully to neither side and chooses to act as a double agent whose position is known to both. 182

Despite his harshness toward Harry, Snape is deeply protective of him because of Lily. He refuses to involve Harry in danger, seeks permission to train him personally, and repeatedly bargains for Harry’s lifelong safety. 183 241 291

Abilities & Skills

Potions Mastery

Snape is a highly accomplished Potions master with an extensive personal collection of rare ingredients and advanced texts. He brews Polyjuice Potion for black-market sale to supplement his income. 114 117

• Keeps hundreds of bottled ingredients and preserved specimens in his office. 114
• Possesses specialized books on advanced potions and magical restoration. 114 115
• Modified a healing spell into a counter-curse capable of treating Sectumsempra wounds. 69
• Assesses the progression and containment of powerful curses, including Dumbledore’s cursed hand. 246

Legilimency and Occlumency

Snape is a master of both mind-reading and mental defense. Dumbledore’s Legilimency can only access memories Snape permits, stopping at his school years. 123

• Uses Legilimency to assess opponents and conceal his own motives. 31 182
• Can maintain Occlumency against Dumbledore’s attempts to probe sealed memories. 123
• His emotional concealment becomes less stable later, prompting concern that his mind has been forcibly disturbed or is suffering uncontrolled fluctuations. 348
• Taught Harry Legilimency after observing Voldemort in Harry’s dreams. 246 247

Dark Magic and Dueling

Snape is a formidable combat wizard whose dueling style emphasizes economy of movement, rapid reactions, silent casting, and defensive precision. 47 75 184

• Invented Sectumsempra, a silent, colorless cutting curse capable of piercing multiple Shield Charms. 48
• Deflects spells through advanced Shield Charm applications and silent magic. 47
• Demonstrated the Imperius Curse, Cruciatus Curse, and Killing Curse to Harry during practical instruction. 184
• Uses a compact wand position to preserve magic and accelerate defensive reactions. 75 184
• Endured attacks from Voldemort and multiple Hogwarts professors despite being injured and outnumbered. 75

Patronus Charm

Snape can produce a silver doe Patronus, which has remained unchanged throughout the years and reflects his enduring feelings for Lily. 247

• Uses Patronus-generated mist to repel Dementors. 312
• His Patronus is treated by Dumbledore as evidence of his unchanging attachment to Lily, not proof of uncomplicated moral alignment. 76 247

Defense Against the Dark Arts Instruction

Snape trains Harry through direct, dangerous experience rather than conventional lessons. 183 184

• Tests Harry’s vigilance by attacking immediately when he enters the training room. 183
• Teaches spell anticipation, movement economy, defensive posture, and wand control. 183 184
• Explains how wand movement can increase magical output rather than casting speed. 184
• Uses harsh practical demonstrations to make Harry understand the danger of Dark Magic. 184

Equipment / Items

• Wand — used with a restrained, highly efficient dueling rhythm. 75 184
• Potion ingredients and cauldrons — his office contains a vast personal supply, including rare materials. 114
• Personal Potion library — maintains advanced texts that Quirrell/Voldemort seeks to consult. 114 115
• Protected study door — warded against Alohomora and other unauthorized entry. 179

Relationships

• Albus Dumbledore — employer, former ally, and mutual manipulator. Dumbledore suspects Snape because of his Death Eater past, while Snape resents being repeatedly used and tested by him. 117 123 182 246
• Voldemort — former master and uneasy ally. Snape initially submits to Voldemort, later presents himself as a double agent, and eventually offers his memories to regain Voldemort’s trust. 181 182 291
• Harry Potter — son of Lily Evans and the person Snape is determined to protect. Snape tutors Harry in combat, bargains for his safety, and refuses to let him be drawn into dangerous plans. 183 184 241 291
• Lily Evans — childhood friend and enduring love. Snape’s silver doe Patronus remains tied to her memory, and his choices regarding Harry stem from this attachment. 123 247
• Lucius Malfoy — fellow Death Eater who exploits Snape’s guilt over Lily and pressures him to act against Dumbledore. 152 186
• Draco Malfoy — Slytherin student whose return to Hogwarts Snape disapproves of, though he recognizes Draco’s ambition. 172
• Augustus Rookwood — former acquaintance whom Snape attempts to recruit away from neutrality and toward the Order or Observer. 345 346
• Quirinus Quirrell / Voldemort in disguise — hostile colleague whose schemes repeatedly frame Snape as a Dark Wizard and Death Eater operative. 47 84 117

Story Role / Major Arcs

Conflict with Professor Quirrell

Snape openly clashes with Quirrell after Quirrell attacks Percy Weasley. Their duel escalates from silent spellwork and defensive counterplay into a large-scale confrontation halted only by Dumbledore’s Transfiguration. 47 48

Voldemort later manipulates the Quidditch match against Snape, repeatedly casting and withdrawing a Dark Curse on Harry so that Snape’s genuine counter-curse appears suspicious. Hermione and Ron report Snape, while Dumbledore confirms that he used Dark Magic without understanding that Snape was trying to protect Harry. 84 85

Suspicion and Departure from Hogwarts

Dumbledore increasingly suspects Snape after incidents involving the fourth-floor corridor, the Quidditch match, and Polyjuice Potion. Snape eventually admits that he brews and sells potions illegally because of financial difficulties. 117

Feeling betrayed by Dumbledore’s continued mistrust, Snape prepares to leave Hogwarts and plans to move to Knockturn Alley. Before departing, he asks Dumbledore to take care of Harry. 123

The Double Agent Decision

After Voldemort confronts him in his own study, Snape submits to the Dark Lord but does not surrender his independence. Voldemort heals Snape’s throat wound and promises not to harm Harry while Snape remains alive. 181

Snape then informs Dumbledore that he will no longer be loyal to either side. He chooses to become an openly recognized double agent, sharing only what each side directly asks of him. 182

Harry’s Secret Tutor

Snape requests permission to tutor Harry in Defense Against the Dark Arts. His lessons are brutal and practical, focusing on vigilance, combat instinct, Dark Magic, and wand technique rather than classroom theory. 183 184

Return to Voldemort’s Service

Snape later offers Voldemort unrestricted access to his memories to establish his loyalty. Voldemort finds no obvious deception, accepts Snape back as a Death Eater, and assigns him to infiltrate the Department of Mysteries. 291 292

The Observer Investigation

Snape contacts Augustus Rookwood at the Hog’s Head Inn and attempts to draw him into a third faction known as the Observer. Voldemort interprets this as characteristic Slytherin caution: Snape refuses to commit entirely to any one side while seeking to secure Harry’s safety. 345 346 347

Trivia

• Students compare Quirrell’s harsh Ravenclaw teaching style to “Snape II.” 36
• Snape’s use of Sectumsempra is so distinctive that Voldemort uses it as part of his accusations against him. 75
• Voldemort repeatedly mocks Snape’s hair, calling it greasy and questioning whether he owns shampoo. 126
• Snape’s gait resembles Voldemort’s, though Snape keeps his arms tucked in while Voldemort spreads his arms to make his cloak billow. 241