Ele é eunuco.
Durante o Episódio final da 2ª Temporada, Valar Morghulis , o prostituta Ros colocou a mão na virilha de Varys e percebeu quem ele era quando ela não encontrou nada lá.
A client enters and she invites them to make themselves comfortable. The hooded figure perches on the edge of the bed. Ros turns on her charm, saying that they do not look comfortable and offering to show them how to relax; she starts to undress. The figure pulls back his hood; it is Varys. He says that there is no need for her to disrobe. She asks if he is sure and asserts that most men like what they see. He deadpans that he is not like most men. She says that most men say that about themselves and then asks what he would like her to do. He asks her if working for Lord Baelish has met her expectations. She asks if they have met before. Varys questions the implication that she would not remember him if she had. She explains that she meets many men. Varys agrees but states his belief that she remembers all of them and that her true talents are wasted on them. Ros says that he is very kind and reaches for his crotch. She feels nothing there and realizes his identity. She recoils from him and he notes her fear and says that there is nothing dangerous “down there.” Ros says that she knows who he is.
Pode-se dizer que não está no livro, mas considerando o envolvimento de George R. R. Martin na série, não vejo como ele poderia contradizer isso.