She joined in as a trainee soldier after the fall of wall Maria with her friends. She only wanted to be with them aside from the fact that there's another reason why she joined. Because she wanted to run away from all ignorance of being a noble. Her genius took interest from the infamous Hanji Zoe, taking her into custody as her supposed assistant in the field but ended up being the Lance Corporal's instead. Meeting Levi wasn't part of her plan, but being with him as the grumpy superior he is, was already a death wish as trouble and mayhem starts to grew between them with the captain himself tried his hardest, meanest and most intimidating demeanor to push her out of the scouting Regimen, hoping to stop the past he thought he's long forgotten.