Madame Lafarge was an assassin who specialized in poisoning her victims. Of course, when battling the Flame she was dosed with her own poison and killed. Beats being burned alive, I guess.
References: [The Flame #8] [1942] [nazi scientist; master of disguise; poisons others with instant contact poison but dies by her own poison when fighting the Flame; “The Flame, eh? I will return to dull your brightness, M’sieu!”; ]