ネズミ鎮守府の大人の加賀犬と子どもの加賀犬は親子である。
訳あってネズミ鎮守府に来た。

ちなみにネズミ提督はただの上司。

The Rat Admiral's adult Kaga-Dog and child Kaga-Dog are both parent and child.
They came to Rat's Naval Base for a reason.

By the way, the Rat Admiral is just a superior.