Nina is what the Admiral is mistaken I-26's gorowase is being spelled. It seems Kirishima is mistaken the entire skit as a genuine star-crossed lovers stories.
I-26 (Nimu) was originally known as I-27 (Nina) before her name was changed to I-26, hence the skit that these 2 started.
MISUNDERSTANDINGPlease stop that, Lieutenant-Commander. I've already thrown that name away. No... sorry. You're already a respectable Vice-Admiral now, aren't you...Nina... You're Nina, right!?So persistent dechi.WAIT, NINA!!SKITWhat kind of soap-opera bullshit are you playing at dechi? Get your ass to Orel already, you damn newbie.You're alive! It's me, Nina! Did you forget me!?