Observation Haki, also called Kenbunshoku Haki, is one of the three forms of Haki introduced in Eiichiro Oda's One Piece manga and anime. It heightens awareness of others and, at an advanced level, allows brief future sight. Charlotte Katakuri became closely linked to the ability during the Whole Cake Island arc, where his calm predictions set him apart as an opponent. Short clips of its activation sound later circulated in anime edits, soundboards and meme videos, where the effect now signals instant awareness, a predicted move or an impossible dodge.