"Smilers are generally hostile, and there have been many confirmed sightings of them. They can be identified by their signature reflective eyes and teeth gleaming in the dark. The best way to escape a Smiler is to keep eye contact. Smilers tend to reside in dark areas on Level 2 and Level 3. Their Base is known to be "The Smiling Room"."
Art done by me, credit to https://sketch.io/sketchpad/, the software I used to make this, and credit to http://backrooms-wiki.wikidot.com/ for the info. Use it if you want just give credit