From pixiv description:
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"Ooi-chi was sunk, so... I'm sorry, Kitakami-sama... Sorry..."

recklessfirex said:

This is the dark counterpart to the gag in post #1500311.

Some girls will talk to their sister ships no matter what.

If you haven't gotten their sister ship yet, then it sounds like they're psycho.
If you lost their sister ship, then get ready for a painful reminder every time they speak.