The Female Titan was one of the Nine Titans, notable for its versatility and ability to mimic the powers of other Titans. By consuming parts of other Titans, it could adapt and display their abilities, making it highly valuable for experimentation by Marley. It also possessed the power to harden its skin selectively, enhancing both offense and defense during battle. 

Adaptation :

According to Annie, it was particularly easy for the Female Titan to exhibit abilities similar to those of the other Titans if it consumed parts of them. As a result, Marley heavily experimented on her. 

One of its most dangerous traits was its ability to attract Pure Titans through screams, similar to the Founding Titan and Beast Titan. However, this ability came with a major drawback: once Pure Titans were drawn to its location, they would attack and devour the Female Titan’s body. Despite the risk, this could sometimes be used tactically, as the steam from repeated injuries provided cover, and the user could escape using ODM gear while the other Titans were distracted. 

The Female Titan also stood out for its exceptional endurance and mobility. This was most clearly demonstrated during the 57th Scouting Mission, when Annie Leonhart maintained high speed and stamina over long distances while pursuing and attempting to capture Eren Yeager. Its combination of adaptability, combat strength, and strategic utility made it one of the most formidable Titans in battle.