This spirit can possess someone for their entire life. Thankfully, no harm is done. Immediately after being possessed, the host shines an invisible light that can only be seen by demons and other spirits. This light stays as long as the host is possessed. When its name is said while it is possessing someone, it will make the host slap themselves in the face before leaving the body. It's possible that it thinks that making the host slap themselves is a proper way of saying goodbye.
Danger: 0/10 Activity (how active the spirit is): 9/10 conspicuousness (how obvious it is when someone is possessed): 1/10 Pain during possession: 0/10 Pain upon leaving: 3/10