Secretary

The President's Secretary is minor character, that has made appearance in Sonic Adventure 2, and she is also is heard in Shadow the Hedgehog. She's seen having blond hair, wearing glasses and dark blue smock during her work.

Sonic Adventure 2
In Sonic Adventure 2 and remake Sonic Adventure 2: Battle, she is seen with the President, when Doctor Eggman demands that the President give up the country. She is also with him in his limousine when Sonic and Tails leap into the limo to pick up Eggman's coordinates.

There is a possibility that she has been contacting with Rouge the Bat throughout the whole game, as she immediately announces to the President, that she is receiving the signal from their agent at the end of the scene.

Shadow the Hedgehog
In Shadow the Hedgehog, she speaks to the President via an answering machine of White House in several cutscenes, informing him about the situation with the Black Arms, including their attacks on four major cities around the world and that the G.U.N. mainframe has been destroyed. She also warns the President about the Black Arms attacking Central City. During Expert Mode, she twice reminds the President of his casual meetings (such as sharing tea) with other world leaders.

Sonic X
The Secretary also appeared in several episodes of Sonic X animated series, with her appearance changed to make her African-American. In the anime, her name is Christina Cooper. She replaced Black Knight as the President's secretary.

Trivia

 * In the Dreamcast version of Sonic Adventure 2, a Secretary theme is DLC. In the Gamecube version, it is possible to unlock the Secretary theme for the main menu. From the theme select screen, you must enter a special code, and she will appear.