Mari is a Unidemon courtesan working at the Palace of the Mystic Courtesans. She's Yuri's twin sister—they're identical, which makes telling them apart tricky, but not impossible. The main giveaways are pretty straightforward: Mari's horn curves to the right (opposite of Yuri's), and she has a distinctive mole under her right eye. Both sisters have a single horn, but that directional difference is usually enough to spot which twin you're dealing with.
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