Kanji セルゲイ
 Romaji Serugei
• Characteristics•
 Race Human
 Gender Male
• Professional Status•
 Affiliation Witch Cult
 Occupation Witch Cult Follower
• Personal Status•
 Status Deceased
• Debuts•
 Light Novel The Oni Sisters of the Hidden Village

Sergei (セルゲイ) is one of the people that attacked Ram and Rem's village.


Sergei is almost always shown to be calm and composed.


Around ten years ago, Faust, Sado, Sergei, and Fogg attacked the Oni Village. Sergei killed Dudley Miload and confronted Roswaal pretending to be Dudley's follower, though he was defeated by the former and had all four of his limbs broken.


Mana Poisoning: Sergei is able to contaminate the atmospheric mana in the nearby vicinity and make it poisonous. As Oni absorb mana through their horns to strengthen themselves, he was their worst possible opponent. This ability is also effective against mages as it makes it harder for them to use the mana.

Explosion Technique (爆裂術式): Seigei is able to use the Explosion Technique, however he admits that he's terrible at it.


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