The key to spotting a yurei's door interaction is pretty specific - they'll slam a fully open door shut with this distinctive double-tap sound that happens almost instantly, while regular ghosts just kinda nudge doors around slowly. When you hear those two interaction sounds right on top of each other followed by a slam, that's your first big tell. The real clincher though is that a yurei can do this anytime, even without starting a hunt or ghost event, and they'll actually hit you with a 15% sanity drain when they do it which is huge for timing your evidence gathering.

The positioning is pretty crucial too - they can even slam those exit doors when they're fully open, something no other ghost type can pull off outside of events. If you're trying to confirm it's definitely a yurei, try leaving those exit doors wide open and watch your sanity meter carefully after any door slams. Regular ghosts just don't have that kind of instant door control - they'll only do partial movements with single interaction sounds, and won't touch your sanity when they mess with doors.

Just remember that timing on the sound is really distinct - it's literally like "tap-tap-slam" all within a split second, not the slow creepy door movement you get from other ghosts. Keep your ears open for that specific pattern and you'll spot a yurei pretty quickly.