Lan Fan serves as one of Ling Yao's two bodyguards, alongside her grandfather Fu. She's fiercely devoted to Ling—so much so that she's basically always on high alert about his safety, often at the expense of her own. What makes her particularly valuable as a guard is her combat skills and her ability to sense chi, which lets her detect Homunculi by picking up on the multiple souls trapped in their Philosopher's Stones. This means she can see right through Envy's shapeshifting tricks, something most people can't do. Ling calls her a "girl," so they're presumably close in age, though her exact age is never specified. She's known for being pretty quiet overall, but that reserved demeanor masks someone who's genuinely skilled and protective.
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