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what is the dragon girl's name in game of thrones
Daenerys Targaryen is a fictional character in George R. R. Martin's A Song of Ice and Fire series of novels, as well as the television adaptation, Game of Thrones
who portrays Daenerys Targaryen
Daenerys Targaryen is portrayed by English actress Emilia Clarke.

Question: when was the character introduced
Self-contained rewrite: when was Daenerys Targaryen introduced