I haven't tried it yet, but I assume her slower speed will make her easier to run away from, but her silent movement could be troublesome if you round the wrong corner and into her sigh
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I've tried her nightmare few times now. Ligeska has a slower 'neutral' speed, but like all predators, she can outrun you on an empty stomach. You can use the other 2 students as bait, but she'll STILL chase you, and she'll digest her prey quickly.
Her being silent and excellent at hunting prey makes it difficult, it's been harder than Satie's nightmare for me