Ferret is a character loosely based off of a certain Funny Animal Game. When he sees you, there's a 50% chance of him either playing music, or his Boombox getting an error. Either way, the sound will attract Baldi, or any other characters who may be chasing you. If the Boombox works, Ferret will follow you with the music, alerting Baldi, and any of the other teachers. If the boombox doesn't work, Ferret will leave.