Chibi Chibi Tsukino is a mysterious and enigmatic character who appears in the final arc of the 'Bishoujo Senshi Sailor Moon' series. She is a small, pink-haired girl with a childlike demeanor and limited speech, usually repeating the phrase 'Chibi Chibi.' Despite her youthful appearance, Chibi Chibi plays a crucial role in the fight against Sailor Galaxia, serving as a guide and source of strength for the Sailor Guardians. Her true identity is eventually revealed, adding depth and significance to the series’ climax.