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Duca Eilie

Dungeon administrator, assassin, and Deific Manifestation mentorFairy Garden

Duca Eilie is Su Ye-Eun's assassin mentor and the being she summons through Deific Manifestation. Duca combines extreme speed, dual-dagger techniques, black aura, and deceptive copies with a battle-hungry temperament, while also teaching Ye-Eun methods for resisting mental interference and controlling shadow. (Chapters 134 and 153; Chapters 228–230 and 316)

Biography

Assassin Mentor and Manifested Fighter

Duca first appears by manifesting through Ye-Eun during the SS+ drake raid. She immediately takes control of the fight's most dangerous opening, lands on the drake despite its defensive steam, and strips scales from its neck with two black-aura daggers so Shin can pierce the exposed point. Her enthusiasm for both combat and Shin contrasts with Ye-Eun's usual manner, making the change of occupant unmistakable. Outside battle, her training gives Ye-Eun the Bleeding Heart breathing method that quickly breaks Luca Bruno's attempted charm. (Chapters 134 and 153)

Ye-Eun summons Duca again against the Lava King, where Duca recognizes Hecate as an old acquaintance, wounds the dragon at speeds Shin cannot follow, divides into copies for Dance of the Fool, and delivers Hecate's restraint through a dagger. She later manifests during the Death King campaign, while Ye-Eun's ability to fight without summoning her in Greenland demonstrates the disciple's growing independence. Duca remains available through Deific Manifestation at the latest reference, but the corpus never establishes whether she possesses a separate living body outside manifestation. (Chapters 228–231, 293, and 319)

Appearance and personality

Duca is seen while inhabiting Ye-Eun's body, so the corpus does not provide an independent face, age, build, hair color, or clothing for her. Her presence instead changes Ye-Eun's bearing and voice: Shin hears the charm of a mature woman rather than Ye-Eun's younger-sounding speech, and others notice a more sensual demeanor despite the unchanged body. She typically appears carrying two daggers surrounded by black aura. (Chapter 134; Chapter 293)

She is exhilarated by strong opponents, aggressively flirtatious, and difficult for allies to keep focused when Shin is present. Hecate treats her appetite for men as a long-established problem, while Shin later considers Ye-Eun a battle maniac comparable to Duca. The same recklessness does not erase her competence: she obeys battle directions, identifies openings quickly, and continues attacking enemies capable of killing her host if the manifestation fails. (Chapters 134 and 228–231; Chapters 313 and 316)

Powers and abilities

Duca's power is expressed through Ye-Eun's Deific Manifestation and centers on assassin speed, dual daggers, black aura, deceptive copies, and techniques passed to her disciple. Her most powerful on-page actions occur through that temporary embodiment, leaving her independent access to the same abilities outside a vessel unconfirmed. (Chapters 134, 153, 228–230, and 293–319)

Deific Manifestation

Duca enters combat through Ye-Eun's Deific Manifestation, taking over her disciple's body, voice, and movements while bringing a much higher level of assassin technique. This grants immediate access to Duca but depends on Ye-Eun initiating the manifestation; later scenes explicitly treat calling Duca as an emergency option rather than a constant state. The corpus does not specify its duration, cooldown, or exact mana cost, and does not demonstrate Duca acting physically without a disciple's body. (Chapters 134, 228, 293, and 313–319)

Speed, aura, and dagger techniques

Duca moves fast enough to vanish from Shin's sight and cut the Lava King's neck before his charge completes. She channels black aura through two daggers, tears through an SS+ drake's scales, evades wide fire attacks, and uses Dance of the Fool to separate into dozens of magically substantial copies that strike together. The Lava King's scale and regeneration limit the lasting effect of her cuts, and she still needs allies to create openings or stop his counterattacks. (Chapter 134; Chapters 228–230)

Hecate's Moonlight Restraint allows Duca's planted dagger to spread blue light and halt the headless Lava King, but the scene presents Hecate as the initiator and Duca as the one who delivers the dagger. It therefore does not establish the restraint as Duca's independent spell. Her confirmed specialties are assassination movement, dagger strikes, black aura, and multiplication rather than broad magical control. (Chapter 230)

Instruction

Duca teaches Ye-Eun Bleeding Heart, a special breathing method capable of canceling a subtle charm, and a technique for controlling her shadow. These lessons continue affecting Ye-Eun when Duca is not manifested and support the disciple's development toward more lethal aura compression. The corpus names the breathing method and shadow control but does not explain their full internal mechanics or show Duca transferring every technique she personally uses. (Chapter 153; Chapters 279 and 316)

Relationships

  • Su Ye-Eun: Ye-Eun is Duca's disciple and vessel for Deific Manifestation. Duca supplies advanced assassin techniques and direct combat power, while Ye-Eun's later ability to survive without calling her marks real growth beyond dependence on the mentor. (Chapters 134 and 153; Chapters 279–319)
  • Kang Shin: Duca is immediately attracted to Shin and repeatedly tries to flirt with him, but she also provides decisive openings against the drake and Lava King. Shin values her fighting strength while remaining wary of her advances. (Chapter 134; Chapters 228–231)
  • Hecate: Hecate and Duca knew each other before their disciples brought them together. They coordinate against the Lava King, although Hecate polices Duca's distractions and warns others about her predatory behavior. (Chapters 228–231 and 313)
  • Daisy Ectradion: Daisy serves as Hecate's manifestation vessel during the Lava King battle and physically checks Duca when she ignores the fight. Their mentors' history indirectly connects the two disciples. (Chapters 228–231)

Items

Duca fights with two black daggers that carry her aura and can serve as the delivery point for Hecate's restraint. The supplied corpus does not name them, explain their origin, or establish whether they belong independently to Duca rather than appearing through Ye-Eun's manifested body. (Chapters 134, 230, and 293)