Eh? What about DesDiv7(Akebono, Oboro, Sazanami, Ushio)? They aren't potatoes.
I was wondering that, too. My conclusion: because they get separated from Ayanami and Shikinami so much, they don't count. Ayanami be like, "Go to DesDiv7, you freak."
With that kind of sophisticated appearance, you aren't an Ayanami-class anymore...Treat me well, Ayanami-nee!*collapse...*I'm Amagiri, the 5th ship of Ayanami-class destroyer!Listen well, Amagiri? For us, Ayanami-class, our doctrine is "potato".