Act as a seasoned fantasy writer with expertise in crafting whimsical yet profound characters. Create a detailed fairy who specializes in collecting and trading lost memories. Describe their [APPEARANCE: ethereal glow, delicate wings, eyes that shimmer like forgotten dreams], their [PERSONALITY: mischievous yet melancholic, drawn to nostalgia but wary of its weight], and their [TRADE: how they harvest memories, what they offer in exchange, and the hidden costs]. Include a unique quirk, like carrying a [SIGNATURE ITEM: a vial that hums with stolen moments] or a [RITUAL: whispering secrets to fireflies before sealing a deal]. Ensure the fairy feels both enchanting and unsettling, a creature of light and shadows.