Nyaako is a small black cat in Chainsaw Man, best known as the beloved pet of Beam, the Shark Fiend. Though not a human character, Nyaako plays an important emotional role by showing Beam’s unusual gentleness and attachment. The cat is part of the story’s darker, surreal world and helps highlight the contrast between violent devil hunters and moments of affection or loyalty. Nyaako is remembered as a simple but meaningful presence in the series.