If you're looking for a suggestion, I can propose a few alternatives:
Inside was a single white feather.
Nicotine is a stimulant found in tobacco and nicotine replacement therapies (NRTs) like gum, patches, or e-liquids. Nicoline might refer to nicotine-based products, such as: nicoline+yiki+exclusive
Guide to Nicoline, Yiki, and Exclusive Products If you're looking for a suggestion, I can
Yiki pressed a cold, smooth drive into Nicoline’s palm. “Then the exclusive is yours. But remember: once you open this, you become me. Hunted. Haunted. Free.” Nicoline might refer to nicotine-based products, such as:
As she left, Nicoline realized that this story was just the beginning. She had uncovered a piece of Yiki's world, a world that was both fascinating and challenging. And she knew that this was a story her readers would love.
Action step: Search for "Nicoline" and "Yiki" separately on social media archives (Reddit, Twitter advanced search, or Discord invite trackers). Look for any mention of a collaboration.