Fubuki Type II and her Type III... what's the relation here? Little sister? Little half-sister?

Scholastica said:

Fubuki Type II and her Type III... what's the relation here? Little sister? Little half-sister?

Half-sister might be most appropriate. By most definitions, they're still sister-ships, they're just a bit different. I've seen a doujin where the 6th DesDiv members call the 7th DesDiv members "onee-san".

Scholastica said:

Fubuki Type II and her Type III... what's the relation here? Little sister? Little half-sister?

Akatsuki and Sazanami were part of DesDiv10 before the war.