Tom

Biodata

Feature	Value
Name	Tom Riddle; commonly called Tom 73.
Alias(es)	Voldemort; the Dark Lord 94 168.
Species/Race	Human wizard represented by soul fragments housed in Horcruxes 93 112 168.
Gender	Male 73 98.
Blood Status	Half-blood 99.
Affiliation	Former Hogwarts student; Slytherin 94 96.
Occupation/Role	Dark wizard; manipulative magical instructor; later used as a computational resource in Gavin’s Book of Ten Thousand Spirits Calculation 76 169 172.
Status	Diary and Diadem fragments destroyed. The Cup fragment is trapped in Gavin’s calculation book; its personality is subsequently obliterated, although traces of its arrogance remain in the book’s expression 99 112 169 172.
First Appearance	Introduces himself through the Diary 73.

Power Progression

Tom’s appearances involve separate Horcrux fragments, not one continuously developing consciousness 99 112 168.

Stage / Realm / Level	Chapter	Notes
Awakened Diary fragment	73 74	Communicates through writing and attempts to drain Gavin’s life force, but Gavin interrupts the absorption.
Escape through soul expenditure	93	Burns part of his soul, finds a flaw in the Flame-Rune Seal, and absorbs its magic. The escape damages both his soul and the Diary.
Recovery through Justin	94	Replenishes himself through Justin’s life force and magic, while fear generated by a staged attack accelerates recovery. Powerful tonics let him drain Justin more freely.
Resurrection threshold exceeded	96 98	Feeding on Cyril, who is impersonating Lockhart, provides the vitality and magic needed to emerge from the Diary.
Temporary physical body	98	Absorbs Cyril’s remaining life force after the Basilisk crushes him and constructs a body capable of wielding a wand.
Cup fragment converted into a computing node	169 172	Enters Gavin’s prepared trap. His soul fragment becomes part of the calculation book, disconnected from its original soul and stripped of its personality.

Background / History

The Diary preserves a sixteen-year-old Tom who has spent roughly fifty years trapped inside it. He retains exceptional magical knowledge and the manipulative habits of his Hogwarts years, but lacks reliable information about the modern world 73 93 96.

The fragments differ in experience. The Tom inside Ravenclaw’s Diadem explicitly possesses more knowledge than his sixteen-year-old counterpart. He remembers Abraxas Malfoy as a school contemporary but does not recognize Lucius until Gavin’s impersonation of Draco supplies the family connection 112.

The Cup fragment identifies himself as Voldemort and admits that he cursed Hogwarts’ Defense Against the Dark Arts position after being refused the job 168.

Appearance

• Diary handwriting: Tall, thin letters with sharp strokes and old-fashioned calligraphic hooks; the writing matches the signature on the flyleaf 73 96.
• Temporary body: Condensed from black mist and stolen life force. Its edges shed mist when strong emotion or magical expenditure destabilizes it 98 99.
• Soul manifestation: The Cup fragment appears as he did when that portion of his soul was split off 168.

Personality

Tom presents himself as a gentle, patient listener to people he intends to exploit. His sympathy for bullied or insecure students is a means of cultivating dependence, and his magical instruction doubles as an attempt to corrupt or control the recipient 73 76 93.

His intelligence is accompanied by extreme pride. Gavin’s fabricated stories about Voldemort serving coffee and sweeping floors for Grindelwald provoke intense humiliation; Tom finds defeat by a baby easier to accept than continued subordination to another Dark Lord 93 94.

Despite his anger, Tom can act cautiously. Once he recognizes Gavin as dangerous, he withholds further information, sacrifices part of his soul to escape, and prioritizes concealment over revenge. Dumbledore is the person he most wants to avoid, with Gavin close behind 93 94.

Abilities & Skills

Magical Theory and Instruction

Gavin judges the Diary fragment’s understanding of Transfiguration to be at a master’s level despite Tom being only sixteen 73.

• Explains Gamp’s Law through the idea that Transfiguration acts on an internally consistent whole rather than permanently altering its intrinsic nature 73.
• Suggests that finer perception might allow spells to target an object’s fundamental constituents 73.
• Teaches a Super-Sensory Charm exercise that progressively narrows perception from a teacup to a grain of sand 74.
• Provides detailed Dark Magic instruction, including lasting curses and the Imperius Curse, which he misleadingly labels a “minor jinx” 76.

Horcrux Absorption and Soul Magic

• Absorbs life force and magic from people in contact with his vessel; draining a young host completely can enable resurrection 93 94.
• Draws nourishment from fear, negative emotions, and wrongdoing 93 94.
• Amplifies existing desires, exploiting Justin’s insecurity and Cyril’s greed 94 98.
• Burns his own soul to obtain temporary magic. This power recovers extremely slowly, and expenditure shortens how long he can remain conscious 93.
• Uses offensive Soul Magic and conjured creatures against Gavin inside the Consciousness Space 168.

Legilimency and Memory Manipulation

Tom’s concealment of Justin’s memories initially defeats Gavin’s attempts to discover the Diary’s influence 94 97.

• Reads memories to gather information about Gavin and Voldemort’s reported defeat 94.
• Alters the apparent timing of memories before sealing them, making a shallow search unlikely to uncover them 94.
• Creates a doorway-triggered spell that restores Justin’s awareness of the Diary inside the library and suppresses it outside 94.
• Uses a Confundus Charm to guide the half-asleep Justin toward the Diary 93.
• Loses control when a new tonic strengthens Justin’s willpower and breaks the memory seals 94.

Combat Magic

• Uses Shield Charms, wide-area Protego Totalum, revealing spells, and Finite Incantatem 98 99.
• Locates a concealed Gavin with the Super-Sensory Charm 99.
• Performs wandless magic to disarm Gavin and cast Petrificus Totalus 99.
• Casts the Cruciatus Curse and begins casting the Killing Curse during their final exchange 99.
• Dissolves his temporary body into black mist to evade blades and restraints, at further cost to its stability 99.

Limits: The temporary body expends power inefficiently and weakens with repeated casting. Cyril’s borrowed wand also prevents Tom from wielding his full power, while unfamiliar spells such as Muffliato force him to rely on expensive general countermeasures 99.

Parseltongue

• Opens Slytherin’s statue and commands the Basilisk 98 99.
• Cannot direct the creature when Gavin’s silencing magic prevents it from hearing his orders 98 99.

Vessels & Items

• Black Diary — Communicates by swallowing written ink and producing replies. Gavin destroys it with the Obscurus, annihilating its fragment and temporary body 73 99.
• Ravenclaw’s Diadem — Houses a separate fragment awakened by Gavin’s impersonation of Draco. Dumbledore restrains it, and Gavin destroys it with the Obscurus 112.
• Hufflepuff’s Cup — Houses the fragment Gavin extracts at Gringotts and diverts into the calculation book 168 169.
• Book of Ten Thousand Spirits Calculation — Imprisons the Cup fragment in an isolation zone and forces it to process mathematical problems. The upgraded book uses both Voldemort’s and Cyril’s soul fragments 169 172.

Relationships

• Gavin Gu — False student, tormentor, and eventual captor. Gavin impersonates Justin to obtain instruction; Tom later fears his potential and angrily watches him turn those lessons against their teacher 73 94 99.
• Justin Finch-Fletchley — Diary host and victim. Tom exploits his jealousy, manipulates his memories, and drains his vitality until Justin breaks free and seeks help 94 97.
• Cyril Rosier — Exploited while impersonating Lockhart. Tom deceives him about the Chamber’s monster and consumes his remaining life force; the Cup fragment later dismisses Cyril’s warnings about Gavin 96 98 168.
• Albus Dumbledore — Feared adversary. Dumbledore overpowers the Diadem fragment through Legilimency inside his own consciousness space 94 112.
• Abraxas Malfoy — Remembered school contemporary who kept watch for Tom in the Restricted Section 112.

Major Arcs

Diary Deception and the Chamber of Secrets

Gavin extracts genuine magical instruction while feeding Tom false accounts of current events. Tom eventually escapes, possesses Justin, and stages bloody writing and Mrs. Norris’s petrification after discovering the Chamber entrance blocked 73 74 93 94.

After transferring his attention to Cyril, Tom releases the Basilisk and constructs a temporary body. Gavin defeats him through concealment, unfamiliar spells, and hidden defenses, then destroys the Diary before Tom completes the Killing Curse 96 98 99.

The Diadem Trap

Gavin poses as Draco and deliberately provokes Tom over the number of Horcruxes. Tom’s insistence that seven is the most magical number exposes information before his Legilimency carries him into Dumbledore’s trap 112.

The Cup and Computational Imprisonment

Gavin deliberately allows the weakened Cup fragment to escape his Consciousness Space. Tom mistakes the exit for a return to the Cup but enters the calculation book instead, becoming a forced computing node 168 169.

By the book’s subsequent tests, Tom’s personality has been obliterated. His characteristic superiority nevertheless survives as an expressive residue in the book’s sarcastic responses—not as confirmed independent consciousness 172.

Notable Quotes

“Hello. My name is Tom Riddle. Who are you?” 73

“You dare use what I taught you against me?!” 99

“Seven is clearly the most magical number—” 112