The anime series "Attack No. 1" features characters such as Kozue Ayuhara, Midori Hayakawa, and Yumi Katsuragi in documented media. No character named "Katia" appears within this series or related materials. The name "Katia" exists elsewhere, including a Mexican social media creator, a character in the video game *This War of Mine*, a yarn company, and a webcomic figure, all unrelated to "Attack No. 1".