The 29-year-old makes the move to England's most prestigious division following four impressive seasons in the French top flight with Montpellier, with her latest spell seeing her return 26 goals from 48 league appearances.
Born in Cuxhaven, Germany, Lena began her career with Hamburger SV, before spending a season in the United States with UCF Knights, where she was named Conference Rookie of the Year.
Since then, the experienced forward has made over 150 senior appearances, netting over 50 goals as Lena enjoyed spells with SC Freiburg and Turbine Potsdam in the German Bundesliga before she made the move to the south of France in 2019.
The highly-regarded striker has represented her nation at multiple youth levels before donning the senior shirt for the first time in March 2016 during the Algarve Cup, and has since gone on to become a regular with the DFB-Frauenteam, collecting a total of 25 caps for her county.
She made her debut against Bristol City on matchday one of the 2023/24 season, scoring a debut goal with a second half header that was then followed up with a first home goal, in a 1-0 win over Everton a week later.