Original sentence: If this is indeed the case, then it creates interesting ramifications: for example, Hermione appears to be the only main character not related to another main character (even Lord Voldemort may be a distant relative of the Blacks and Malfoys); Harry may well be closely related to both his schoolyard enemy, Draco Malfoy; and Harry may also be third cousins with his best friend Ron Weasley, and his "current girlfriend", Ron's sister Ginny
Edited sentence: If this is indeed the case, then it creates interesting ramifications: for example, Hermione appears to be the only main character not related to another main character (even Lord Voldemort may be a distant relative of the Blacks and Malfoys); Harry may well be closely related to both his schoolyard enemy, Draco Malfoy, and his best friend, Ron Weasley (whom he appears to think of as a brother); and, should Harry and Ginny ever marry, their children would, were this the case, be mildly inbred (i.the children will be fourth cousins to each other)