Who is this?

You're already so grown up, and yet you still haven't learned how to read... The text contains mistakes: "такои большои" (takoi bolshoi) should be "такой большой" (takoy bolshoy). Also, the adjective form depends on gender: "такой" (takoy) for males and "такая" (takaya) for females, but it's unclear which gender the phrase refers to.