What got me excited to do Grima Wormtongue is when I was young I went through a period in boarding school were I was picked on alot. And there is something about Grima, he has been picked on when he was a kid, he (Grima) is so distrustful, he is so easily corrupted, He is so ugly, and he wants somebody, he wants to love somebody, and he can't, because nobody will have him.
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