Boos are common ghost enemies in the HTFA series that first appear in HTF Origins. They are a type of white spherical ghost with menacing and constantly open mouths. They are known for their large tongues and small "arms" of some sort. However, the most distinctive characteristic of the Boos is their shy personality, where they cover their faces when someone looks them directly at the face.
Community content is available under CC-BY-SA unless otherwise noted.