Lena Masalu Catalina is a central character in the anime series "Nia no Rentan Koubou." She is a talented and determined engineer known for her innovative designs and dedication to her craft. Throughout the series, Lena plays a crucial role in supporting the protagonist with her technical expertise, often inventing new gadgets and machinery that aid in their adventures. Her strong sense of justice and unwavering loyalty to her friends make her an indispensable ally and a beloved character in the narrative. Lena's character development explores themes of perseverance and friendship.