Grand Admiral Thrawn
Although there are some exceptions, expanded universe works are generally accepted as canon, or part of the "official" storyline continuity. Otherwise, they are considered apocrypha. In some cases, characters created for an expanded universe are later featured in the primary works associated with that franchise, as in the cases of Aayla Secura and Grand Admiral Thrawn in the "Star Wars" franchise. When all expanded universe works (films, novels, comic books, video games, role-playing games, etc.) are considered canonical, then the expanded universe is an "imaginary entertainment environment."