Margaret is called unnatural because she leads Henry's troops and makes all the decisions. Henry becomes weaker and weaker, and Margaret takes over more of his position. Whether he became weaker and she stepped in or she made him weaker is unclear. But she is not the only "unnatural" woman in the
Like Henry's marriage to Margaret, Lady Gray is a woman without international connections and without cash to offer. Henry's marriage was considered unwise because it opened him up to the influence of those who had influence on Margaret, thus, weakening the crown. Edward's marriage, too, seems dangerous, since he made a decision without consulting his brothers, out of passion rather than rational choice. He nearly loses the kingdom because his choice alienated his ambassador Warwick and the king of France, who gives reinforcements to Margaret, as well as his own brother George, who turned against him and joined Margaret's army with other nobles.
Richard is the only character who speaks in soliloquies, which provide the audience with major insights into his mind and his plans, especially those plans that involve him pretending to be a loyal brother while he plots the demise of Edward and George. Thus, he allows the audience to see both sides of his behavior. His control of language is impressive, and he elaborately explains his point of view, his frustrations, and his plans. His ability to manipulate language will carry him far in deceiving the members of the court and playing the nobles against each other.