Talk:Mutsuki/@comment-171.233.81.230-20150403104313

They don't need siblings to be sisters, Actually in the history, ships of same class were often constructed from different factories.

However some people can consider they are "half" siblings, by the way they had same "fathers" - their designers.

In the anime, even some of the same outfit ships call each other "-san" ( Ooi - Ktkm, Mutsuki - Kisaragi ), so you don't need to force them to have sibling-bond, or question about ships in same class but drawn by multiple artists. It will restrict our creativity.