Hattori is a pigeon and the loyal companion of Rob Lucci, a prominent member of CP9 in the anime and manga series One Piece. Known for his sharp intelligence and the unique way he communicates on behalf of Lucci, Hattori often wears a tie and mimics human gestures, adding a comedic touch to intense scenes. Despite being a bird, Hattori is an integral part of Lucci's persona and has become a memorable minor character in the series.