Yui Nishina is a minor character in the anime series "Shingeki no Kyojin" (Attack on Titan). She serves as a member of the Garrison Regiment, which is responsible for guarding the Walls and maintaining order within the regions they protect. Yui is known for her diligence and dedication to her duties, often seen participating in various defense operations. Though her appearances are limited, she embodies the spirit of humanity's perseverance in the face of the Titans' threat. Her character adds depth to the world of Attack on Titan by showcasing ordinary soldiers' roles and struggles.