The way it is now irks me somewhat because the button that releases her cannot be depressed by the player, which goes against established Portal conventions. Also, there has been some concern as to the player not finding the disabled sentry gun to place on the button.
I believe an effective introduction to Emmy would be to have the room with her dispenser be in a room behind a partial glass partition, with several sentry guns on the other side, shooting at the player. On the player's side of the partition there would be a pedestal button which releases Emmy, at which point she lands next to the sentry guns guarding entrance to the room and vaporizes them.
To drive the point home, the player would then be required to pick Emmy up and carry her into the next room, where a sentry gun placed safely next to the entrance would again be vaporized as the player walks past (the player would be shot at if they attempted to enter the room without Emmy though).


