England Under-23 international Melissa Lawley joined City in January 2017.
The 22-year-old signed for the Super League champions, bolstering Nick Cushing's attacking options.
Creative, with pace and flair, Lawley hopes to develop her talent and progress her international career.
Lawley signed for Birmingham in 2013 from Bristol Academy. Born in Kidderminster, she began her career with Arsenal and gained valuable Champions League experience.
The forward had faced her new Club six times for Birmingham, and liked what she saw from the opposition. Now, she is relishing the competition that accompanies joining the reigning champions.