It was a fucking disaster that got Chiyoda sunk.
So yeah I got back to levelling for a few days until I got Haruna Kai:
And then while levelling I found myself in front of the boss without having taken too much damage, so figured I'd give it another try, and...
Drop was Haruna though whom I obviously already had.
Proceeded on to 3-1 and got Souryuu.
I still like Shigure best though.
Edit (9th January):