Conversation so far:
who is the voice of miss crawley in sing
Garth Jennings voices Miss Crawly in Sing
what does miss crawly do in the film sing
Miss Crawly is an elderly iguana with a glass eye who is Buster's administrative assistant in the film Sing
who is buster in the film sing
Buster Moon from the film Sing, is an optimistic koala who plans to save his theater from closure by holding a singing competition
does buster moon succeed in saving the theater in the film sing
In Sing, Buster Moon's show is a success and impresses Nana. She buys the lot and the theater is rebuilt and reopened.

Question: who is nana
Self-contained rewrite: who is nana in the film sing