The Doctor, also known as Fait, treats patients with illnesses. One of her other occupations is potion merchant.

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One of her patients was a citizen. The Doctor was accused of selling illegal drugs to her patients. In reality, she was tasked with bringing in goods brought by her Supplier. Word got out to a police agent, resulting in him investigating her work.

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Skillful in purifying chemicals for the public consumption, The Doctor modified The Supplier's goods to make them family friendly. As an effect of this, children became poisoned. After learning about these mysterious potions, the monsters hunted for her goods.