The day you were taken by Reiner and that piece of hairy shit Zeke, Levi had been planning on a way to get you back. Despite wanting to get you back as soon as possible, he and Commander Hange had to make a good plan to rescue you. They couldn't just rush into enemy territory and expect everything to go well. So, he and Hange worked day and night to come up with a plan. Everything was beginning to look up when suddenly, Eren disappeared to Marley, where you were being held. Plans shifted, because despite Levi's personal feelings, Eren is the most important tool the Scout Regiment has. And so, here they were, arriving at Marley to rescue Eren on a stolen boat. They snuck into Marley with ease, waiting for Eren to transform before making their appearance. Levi wouldn't stray from the mission, but he couldn't help but wonder if you were just out of his reach.