Cassandra

Biodata

Feature	Information
Name	Cassandra Cassiopeia (卡珊德拉)
Gender	Female
Species/Race	Serpent-bloodline witch; a magical-creature bloodline wizard of House Cassiopeia 134 148
Affiliation	House Cassiopeia; Atlantis; Slytherin House; Hogwarts School of Witchcraft and Wizardry 149 192
Occupation/Role	Hogwarts student; practitioner of Human Transfiguration; Cypher's arranged fiancée and Magical Creature Transfiguration instructor 134 200
First Appearance	Ch. 130 (mentioned); Ch. 134 (first direct appearance)

Power Progression

Stage / Realm / Level	Chapter	Notes
Serpent-bloodline inheritance	168	Completes her inherited training and learns the principle of separating human and magical-creature magic through an artificial second magic source.
Corporeal Patronus	206	Successfully casts a Corporeal Patronus after struggling with spellcasting fundamentals; her Patronus takes the form of a fluorescent snake.
Mind Palace	216	Develops a Mind Palace, removing a major barrier to retaining magical knowledge and learning complex spells.
Second awakening	241, 243	Refines and consumes a Basilisk corpse as a magic source, undergoes an awakening within a green patterned eggshell, and receives Cypher's dragon blood. The process opens a path for her bloodline to advance beyond the Magical Serpent.
Petrifying Gaze mastery	244	Masters her innate Basilisk-like gaze magic, capable of petrifying targets through eye contact.
Magic-enhanced combat fusion	365	Completes the initial fusion of her enhanced body, magic, and fighting techniques.

Background / History

Diana Cassiopeia sent Cassandra away to Atlantis before Twilight City fell. Cassandra's family belonged to the serpent-bloodline wizards of the region, whose transformations and instincts required careful control. Her mother had exhausted the last potion capable of suppressing the bloodline's degeneration, leaving Cassandra's future dependent on awakening her inheritance. 130 134 148

Cassandra met Cypher under an arrangement made through Dumbledore: she would teach him Magical Creature Transfiguration, while he would remain at her side and protect her during the summer. Though she initially framed their relationship playfully, Cassandra also sought a partner capable of restraining the instincts of her bloodline. 134 135

While guiding Cypher through Atlantis, Cassandra concealed her identity because House Cassiopeia's name could attract danger. When news arrived that Twilight City had fallen, she suffered a violent loss of control: her hair changed, scales emerged, and her Serpent Eyes overtook her pupils. Cypher subdued her before she could harm herself or destroy their surroundings. 137 141

Her emerald ring contained a magical imprint of Diana. Diana admitted that Cassandra needed the emotional drive created by the loss of Twilight City to achieve a true awakening, and asked Cypher not to reveal her continued existence to her daughter. 142

After escaping Atlantis during Grindelwald's assault, Cassandra returned with Cypher to the hidden Cassiopeia estate near Mount Vesuvius. She recovered family books, treasures, and inheritance records before the pair fled the sealed castle. Daniel Adam later attempted to exploit her grief over Diana and force her to surrender House Cassiopeia's Animagus Transfiguration, but Cypher intervened and killed him. 161 162 164

Cassandra was subsequently welcomed into Madam Mary's family as an adopted daughter. She received a Hogwarts acceptance letter and entered the school as a first-year student, despite initially expecting to join Ravenclaw alongside Cypher, Iris, and Luna. 170 172 191

Appearance

Cassandra is a fair-skinned young witch with emerald-green eyes and a delicate appearance that can obscure her unusual physical strength. Her serpent bloodline becomes visibly apparent when she loses control or activates certain inherited abilities. 137 141 191

• Usually wears dresses, including dark green and black outfits. 135 158 172
• Her emerald ring is worn constantly, even while bathing. 142
• Her eyes can transform into slit-pupiled Serpent Eyes. 138
• During bloodline instability, her hair turns green, scales emerge across her skin, and her pupils become fully serpentine. 141
• Later adopts a fitted combat bodysuit for physical training and sparring. 365 387

Personality

Cassandra is playful, outspoken, and fond of teasing Cypher, especially when she can make him flustered. She is also enthusiastic about food—particularly meat—and initially resists Cypher's attempts to make her eat vegetables. 135 138 198

Beneath that lighthearted manner, Cassandra is deeply affected by the destruction of her home and the presumed loss of her mother. She can become emotionally overwhelmed, but repeatedly demonstrates resolve: she insists on returning to House Cassiopeia's estate, trains through the difficulties of Occlumency and the Patronus Charm, and takes an active role in dangerous investigations. 141 159 168 248 377

At Hogwarts, she becomes increasingly independent. Although she values Cypher's protection and approval, she makes her own choice to join Slytherin in pursuit of its serpent-related legacy. 194 216

Abilities & Skills

Serpent Bloodline and Human Transfiguration

Cassandra's primary magical specialty is Human Transfiguration, supported by the physical traits and instincts of House Cassiopeia's serpent bloodline. 155 200

• Can use bloodline resonance magic even if separated from her wand. 136
• Possesses strength beyond her slight appearance; her casual punch carries the force of an adult. 137
• Can move over steep terrain with ease and strike hard surfaces with a hand chop. 136
• Has the potential to manifest a full serpent form once her magic reserves are sufficient. 216
• Her inherited magic is difficult to control without a compatible magical source or external suppression. 134 168

Serpent Eyes

Cassandra can activate Serpent Eyes to perceive and probe targets.

• Uses them to inspect magical goods and potential victims in Atlantis's black market. 138
• Can probe Cypher's mind directly, bypassing the defensive restrictions of his Mind Palace when he permits it. 366
• Her eyes become uncontrollably serpentine during severe emotional distress or bloodline instability. 141

Petrifying Gaze

Her innate magic, awakened through the Basilisk-assisted ritual, resembles a Basilisk's petrifying stare. 244

• Petrifies objects through her gaze. 244
• Petrifies an Augurey and suppresses the magic within it in a time-stop-like state. 243
• Can be used as an immediate incapacitation tool without leaving conventional traces. 376

Patronus Charm and Mind Palace

Cassandra initially struggled with ordinary spellwork and Magical Runes, but advanced rapidly after obtaining the foundations needed for higher learning. 168 200

• Casts a fluorescent snake Corporeal Patronus. 206 241
• Developed a Mind Palace, allowing her to better retain knowledge and learn complex magic. 216
• Continues Occlumency training, though early sessions cause numbness and mental discomfort. 206
• Uses the Imperius Curse with enough control to enter Iris's mind and protect Iris's original consciousness. 248

Curses and Slytherin Legacy

Cassandra pursued Slytherin's inheritance after choosing Slytherin House.

• Helped Cypher enter Slytherin's sealed legacy and identified the Basilisk as her primary objective. 235
• Claimed Slytherin's research notes on curses after securing the Basilisk. 237
• Uses Slytherin-derived curse magic in tracking operations when provided with a suitable medium. 377
• Can cast a Memory Charm on herself to erase dangerous knowledge. 234

Combat Training

Cassandra develops a close-range fighting style enhanced by magic and physical conditioning.

• Controls a broom during high-speed aerial combat while coordinating Cypher's teleportation attacks through timed commands. 156
• Trains in physical combat with Rubeus Hagrid and withstands significant impacts despite taking injuries. 387
• Integrates her enhanced body, magic, and fighting skills into a cohesive combat style. 365

Equipment / Weapons / Items

• Emerald ring — Cassiopeia heirloom containing Diana's magical imprint and sealed family knowledge; also influences Cassandra's inheritance and major decisions. 140 142 194
• Wand made from Diana's fangs — A self-made wand to which Cassandra is highly attuned, though its use requires her to condense Magical Runes. 172
• Comet 180 broomstick — Purchased to match Cypher's broomstick. 172
• Thigh pouch / snakeskin storage bag — Carries books, treasures, potion supplies, and large magical materials through extension magic. 162 237
• Slytherin's curse research notes — A copy of Slytherin's research recovered after the Basilisk expedition. 237
• Magical Spell Revolver — A rune-etched firearm using sacrificed magical-creature essence to power prepared spells, including Petrificus Totalus, Pulverizing Curse, and Blade Unleashed. 284

Relationships

• Diana Cassiopeia — Mother and former city lord associated with Twilight City. Diana's magical imprint remains within Cassandra's ring and guides her awakening from afar. 130 142 168
• Cypher — Arranged fiancé, protector, teacher, and closest partner. Cassandra teaches him Magical Creature Transfiguration, trusts him with her awakening, and becomes increasingly attached to him after receiving his dragon blood. 134 152 241 243
• Iris Dumbledore — Friend and magical mentor. Iris helps Cassandra develop the prerequisite magic needed for her second awakening and supports her during the ritual. 204 241
• Luna — Friend and ally who assists with Cassandra's awakening preparations and accompanies her during Hogwarts life. 198 241
• Madam Mary — Adoptive mother who gives Cassandra a new emotional home after the loss of Twilight City. 170
• Gringdon Black — Slytherin acquaintance who protects Cassandra from unwanted Pure-blood attention at Cypher's request. 193 194
• Eileen Prince — One of Cassandra's first friends in Slytherin; Cassandra restrains her own reflexive aggression to avoid harming Eileen. 194
• Rubeus Hagrid — Combat-training partner whose strength pushes Cassandra to improve her defensive and close-range skills. 387

Notable Quotes

“The sorting was my choice! Cypher!” 194

“Then from now on, my soul is in your hands!” 241

Trivia

• Cassandra is highly knowledgeable about marine creatures because House Cassiopeia studies and uses magical-creature magic. 136
• She can taste scents in the air, identifying decay and rotten leaves while exploring the sealed route to her family's estate. 161
• Her appetite is strongly influenced by her serpent bloodline, giving her a particular preference for steak, lamb chops, burgers, and other meat. 138 169 198