Luka is one of the alien performers at the centre of Alien Stage, a musical animated series where contestants sing for survival, and his pururu has become a favourite shorthand for his gentle, otherworldly charm among fans. The clip spread through short fan edits, tribute videos and reaction posts, where viewers recognised the sound instantly even without dialogue. It endures because it is short, distinctive and emotionally warm, letting creators signal affection for Luka or add a soft, alien sweetness to otherwise ordinary moments.