
Smog is a meticulous poison specialist and one of three hired guns Akira Takaoka brings to Okinawa alongside Gastro and Grip, tasked with helping to kill Korosensei during the island operation through his custom-brewed toxins.
Smog has a rounded face set with narrow eyes, heavy brows, and dark hair. A broad, flattened nose sits at its center, and because his trade involves toxins he usually keeps a mask on to guard against his own creations.
A meticulous streak defines him. He insists on brewing every poison and pathogen personally in a purpose-built lab rather than trusting anyone else's work. Beneath the profession sits a surprisingly humane man who tends to the people he infects when a job does not call for their death, and he refuses to unleash a genuine virus on the students once he realizes Takaoka never intended to hand over the cure.
Smog's craft is chemistry turned toward harm. He formulates his own distinctive poisons, viruses, and related agents, and the same expertise runs in reverse, letting him compound medicine, including the pills used to counter what turns out to be nothing worse than a common stomach bug.

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Smog is a meticulous poison specialist and one of three hired assassins Akira Takaoka brings to Okinawa alongside Gastro and Grip. He is tasked with helping kill Korosensei through his custom-brewed toxins.
Smog has a rounded face with narrow eyes, heavy brows, dark hair, and a broad, flattened nose. Because his work involves toxins, he usually wears a mask to protect himself from his own creations.
Smog's specialty is chemistry turned toward harm. He formulates his own poisons, viruses, and related agents, and uses the same expertise in reverse to compound medicine when needed.
Smog works as a hired assassin for Akira Takaoka during the Okinawa operation, but he shows a surprisingly humane side, tending to people he infects when a job does not require killing them and refusing to unleash a real virus on the students once he realizes Takaoka never planned to hand over the cure.
Smog works alongside fellow assassins Gastro and Grip, all three hired by Akira Takaoka to help eliminate Korosensei during the Okinawa operation.
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