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Satono Nishida's Focus Shot (a Touhou LW original). She fires bullets in a pattern similar to brain waves. Slow-wave sleep is a stage of non-rapid eye movement sleep (NREM), also known as quiescent sleep. It is extremely difficult to understand what goes on inside someone else's head when they are in the NREM stages of sleep. They may be experiencing a world beyond our understanding.
Solo
Temporary Slow-Wave Sleep
x4 Yin
Solo
Deep Slow-Wave Sleep
x2 Yin 1
Solo
Non-REM Sleep
x2 Yang 2
Solo
Long Slow-Wave Sleep
x2 Yin 2
Solo
Forever Non-REM Sleep
x2 Yang 3
Solo
Forever Slow-Wave Sleep
x2 Yin 3

Characters with Shot