Kuku (クク) is a supporting character in I've Been Killing Slimes for 300 Years and Maxed Out My Level, voiced in Japanese by Kotori Koiwai. The series' music includes "「Creditless」Slime Taoshite 300-nen Season 2 OPENING - 『So☆Lucky』4K 60FPS", "「スライム倒して300年、知らないうちにレベルMAXになってました」ノンテロップED 和氣あず未「Viewtiful Days!」".
