Nuko is a mysterious, cat-like creature encountered by the protagonists Chito and Yuuri in the anime and manga series 'Shoujo Shuumatsu Ryokou' (Girls' Last Tour). With its soft, white, blob-like appearance and cat ears, Nuko quickly becomes a companion to the girls as they travel through the post-apocalyptic world. Nuko displays unusual, almost supernatural abilities, which intrigue the protagonists. Its enigmatic nature and gentle demeanor provide moments of comfort and curiosity in the otherwise bleak setting, serving as a symbol of hope and companionship.