Nekomata Okayu is a Japanese VTuber from Hololive's Gamers unit who debuted in 2019, known for her unhurried, sleepy persona and catgirl design. Her elongated 'okayuu~~' became a signature greeting among fans, who quote it in chat whenever she starts a stream. She frequently collaborates with fellow Hololive VTuber Inugami Korone, and clips of the pair helped carry the catchphrase beyond her own audience. Today it appears across meme edits, stream intros and reaction compilations as shorthand for cosy, low-energy charm.