Katori Yuu is a training cruiser in the popular anime and game series Kantai Collection, also known as KanColle. She is depicted as a kind and gentle character, often seen as a motherly figure to the fleet girls. Her role in the series is to provide guidance and support to other ship girls, helping them improve their skills and strategies in naval battles. Katori's calm demeanor and nurturing nature make her a beloved character among fans, serving as a symbol of wisdom and patience in the series.