Cyberlina

Biodata

Feature	Details
Name	Cyberlina Sekerei (塞柏琳娜)
Alias(es)	Professor Sekri; Senior Sekerei; Cyber 7 9 12
Species/Race	Human witch
Gender	Female
Affiliation	Hogwarts School of Witchcraft and Wizardry; Slytherin House 6
Occupation/Role	Fifth-year transfer student; Potions Professor's Assistant; former Hogwarts professor 6 13
First Appearance	Chapter 1: “New Student”

Background & History

Cyberlina attended Hogwarts in an earlier era, where Potions professor Isolt Sharp privately tutored her. Her OWL record reportedly contained six Outstanding grades and one Acceptable. She later served as a Hogwarts professor, becoming known to Dumbledore, the castle’s ghosts, and portraits from past headmasters. 3 4 13

Her relationship with Ominis Gaunt defined much of her later life. Ominis was her lover and husband; his blindness influenced the darkness of their former home. After his death, Cyberlina pursued soul research and attempted to bind their souls, an effort she later came to regret. 2 3 13 48

During her earlier life, Cyberlina became involved with Sebastian Sallow’s attempts to cure Anne Sallow. She refused to proceed with a method that would leave Anne as an empty “puppet,” though Sebastian accused her of manipulating both him and Ominis. 26

Cyberlina also modified a Guardian’s Oath contract and bound herself to Ominis instead. At some point, she absorbed dark substances connected to Ancient Magic, becoming its unrestricted wielder while reportedly retaining her sanity. 26 27

Her hatred of the Gaunt family led her to destroy Gaunt Manor, use the Imperius and Cruciatus Curses on its members, extract their souls, and burn them. She later admitted that revenge did not erase her hatred. 34

She returns to Hogwarts in the present as a fifth-year transfer student. Dumbledore believes her return may be connected to Merlin and an approaching crisis involving Voldemort, while Cyberlina adopts eliminating Voldemort as the purpose of her new life. 1 9

Appearance

Cyberlina presents herself as a poised young witch with an elegant manner, though her apparent age conflicts with her long history at Hogwarts.

• Black hair; later seen with long hair, though older photographs show her with short hair. 2 7 31
• Light brown eyes described as molten gold or pale golden-brown. 2 20 24
• Her eyes are less sensitive to light; her former home was kept deliberately dark for both her and Ominis. 2
• Often wears Slytherin robes, but also favors dark green clothing with silver or snake-like details. 6 20 38 41
• Her robe sleeves contain pockets enlarged with Undetectable Extension Charms. 21

Personality

Cyberlina is composed, courteous, and frequently warm toward students. She patiently answers questions, assists younger pupils, comforts frightened animals, and encourages Harry to use Parseltongue responsibly rather than fear it. 12 13 18

Her kindness is paired with a calculating, teasing temperament. She often speaks politely while exposing lies, manipulating a conversation, or steering others toward conclusions she wants them to reach. Dumbledore, Snape, and Sebastian each recognize that she conceals motives behind an approachable exterior. 4 9 11 26

She is intensely protective of people she cares about, especially Ominis, but this loyalty can lead her toward forbidden research and ruthless retaliation. Her confrontation with the nine-cup trial shows that she still carries deep grief and regret over Ominis’s death. 34 48

Abilities & Skills

Ancient Magic

Cyberlina is an unrestricted wielder of Ancient Magic after absorbing dark substances associated with it. Her magic can manifest as blue traces, ancient characters, and white flames visible only to her in some cases. 26 30 42

• Alters spaces and concealments without a magical signature Snape can detect, including opening a hidden room through what appears to be a window. 2
• Reconstructs and transforms her former residence with runes and Ancient Magic. 2
• Creates and inscribes runic seals, including sealing the Chamber of Secrets and removing its Parseltongue password. 21
• Produces a first-person memory display for the Wizengamot, supported by an Unbreakable Vow affirming its truth. 30

Soul Magic

Cyberlina has extensively researched souls, life force, emotions, and dark substances. Neophyte states that her Ancient Magic can purify souls. 23 25

• Extracts souls from living bodies and can burn or imprison soul fragments. 24 34
• Separated Tom Riddle’s soul from his diary temporarily, burned it with white flames, read his thoughts and memories, and forced it back into the diary. 23 24
• Identifies the soul-tainted aura surrounding Riddle’s diary and recognizes its effect on Ginny Weasley. 18
• Her soul research was originally driven by her wish to restore or bind herself to Ominis. 13 48

Legilimency and Emotional Perception

Cyberlina is highly proficient in Legilimency and can read memories, thoughts, and emotional states.

• Used Legilimency on Harry after discovering he was a Parselmouth; she later apologized for invading his privacy. 10 12
• Reads Riddle’s thoughts while his soul is exposed outside the diary. 24
• Senses Snape’s emotions and can infer the fears, resentment, or motives of those around her. 25 34
• Her presence is sufficiently dangerous that Dumbledore uses Occlumency to avoid revealing memories while speaking with her. 9

Combat Magic

Cyberlina combines basic spells, silent casting, agile movement, and overwhelming magical power in combat.

• Protected Harry from the Basilisk with Protego, blinded one of its eyes, and drew its attention away from him. 20
• Used Levioso to lift the Basilisk and Depulso to send it flying through stone pillars. 21
• Demonstrated precise use of Diffindo, Accio, and animated stone projectiles against the Basilisk. 21
• Uses wandless magic and can perform complex spells silently. 21
• Transfigured Grindelwald into a white cat to conceal him from Dumbledore. 42

Enchantment and Magical Craft

Cyberlina is skilled at modifying magical objects and creating practical enchantments.

• Enhanced the Marauder’s Map with greater range, a three-dimensional Hogwarts projection, and a Human Presence Charm. 28
• Used a Confundus Charm to prevent Fred and George from tracking her on the map. 28
• Creates enlarged storage spaces through Undetectable Extension Charms. 21 30
• Made identical cups to deceive a magical basin while retrieving Slytherin’s locket. 49

Potions and Alchemy

Cyberlina considers Potions a weaker subject relative to her other disciplines, but remains capable enough to assist Snape and handle advanced ingredients. 2 13

• Retrieves and supplies rare herbs, alchemical materials, and potion ingredients for Snape. 11 13 44
• Processes Potions materials and assists students with coursework in Snape’s office. 13
• Collected a Basilisk fang as an alchemical material. 21

Equipment / Items

• Wand — used for combat, transfiguration, runic work, and large-scale enchantments. 2 20 21
• Extended-sleeve robes — contain magically enlarged pockets for carrying items. 21
• Research notes from Isolt Sharp — notes on medicine brewed for Ominis, retrieved from Cyberlina’s former residence. 2
• Enhanced Marauder’s Map — upgraded by Cyberlina and given to Fred and George after testing its functions. 28
• Basilisk fang — collected for alchemical use. 21

Relationships

• Ominis Gaunt — her lover and husband; his death and her failed attempt to bind their souls remain central to her grief and soul research. 2 3 48
• Albus Dumbledore — former student and long-standing associate. Their relationship combines mutual respect, distrust, old grievances, and reluctant cooperation against Voldemort. 1 9 24 48
• Severus Snape — Potions professor whose assistant Cyberlina becomes. He accepts her materials and guidance while remaining wary of her manipulation and power. 11 13 34
• Harry Potter — a student she mentors in Parseltongue, dark magic, and practical combat; she also protects him during the Basilisk battle. 12 15 20 21
• Sebastian Sallow — former associate in Anne Sallow’s treatment; their shared willingness to use dark magic is tempered by Cyberlina’s refusal to sacrifice Anne’s autonomy. 26
• Fred and George Weasley — prank-minded students whom she supplies with magical items and helps by upgrading the Marauder’s Map. 28
• Gellert Grindelwald — addresses Cyberlina as “Teacher.” She recruits him to retrieve the Resurrection Stone, later hides him at Hogwarts in cat form. 41 42 44
• Tom Riddle / Voldemort — Cyberlina’s stated target. She confronts, psychologically dismantles, and temporarily burns his diary-bound soul. 9 23 24
• Rubeus Hagrid — Cyberlina uses her memories to expose Riddle’s role in the Chamber of Secrets incident and clear Hagrid’s name. 30

Story Role / Major Arcs

Return to Hogwarts

Cyberlina arrives late in August as a fifth-year transfer, is sorted into Slytherin, and rapidly draws attention through the re-emergence of the Sekerei name. Her return unsettles Dumbledore, who believes she may be tied to Merlin’s response to Voldemort. 1 6 7

Chamber of Secrets

Cyberlina identifies Harry as a Parselmouth, recognizes the connection between his scar and Voldemort, observes Ginny opening the Chamber, and helps train Harry for the confrontation. She ultimately helps defeat and seal away the Basilisk, permanently removing the entrance’s Parseltongue password. 11 18 20 21

Tom Riddle’s Diary

Having deliberately taken the diary, Cyberlina extracts Riddle’s soul fragment, burns it, reads its memories, and forces Riddle to confront the fear beneath his obsession with immortality and power. 23 24

Ministry Re-examination

Cyberlina publicly displays her memories of young Tom Riddle before the Wizengamot, forcing the Ministry to recognize Riddle’s crimes and clear Hagrid of responsibility for the Chamber’s first opening. 30

Hidden Research and the Gaunt Past

Dumbledore investigates Cyberlina’s prior soul experiments, her absorption of dark substances, and the Guardian’s Oath she modified for Ominis. Cyberlina later admits the extent of her revenge against the Gaunt family to Snape. 25 26 27 34

Horcrux Hunt

Cyberlina works with Dumbledore to recover Slytherin’s locket and investigate Voldemort’s cave Horcrux. In the cave, she endures Riddle’s nine-cup trial, confronting her grief over Ominis and her inability to change the past. 47 48 49

Notable Quotes

“No matter what kind of magic or skill it is, its purpose and the results of its use depend on the user.” 12

“There is no eternal life in this world, but souls are indelible.” 24

“Every piece of his soul will be dealt with by me.” 39

Trivia

• Cyberlina’s letters are addressed both to “Cyberlina Sekerei” and “Professor Sekri,” prompting speculation that she is the same famed Sekri from decades earlier. 7
• Her name repeatedly vanishes from the Marauder’s Map because she uses a Confundus Charm. 28
• She can hear exceptionally faint sounds. 12
• She calls Dumbledore “Albus” or “Al,” while he calls her “Cyber.” 1 9