In the movie Red Sparrow, Dominika Egorova (Jennifer Lawrence) is strictly told during her training to never reveal her real name. Still when she is assigned to her first mission, she reveals her real name by using it to sign up for the pool.
It can be seen as a gesture to win Nathaniel Nash's (Joel Edgerton) trust. But wasn't it a dumb move to begin with? What if Americans decided to eliminate her after she served her purpose? Or threaten her to continue to work as their mole?