In fairness to Iku, she did say "when you get bigger". She's not completely sociopathic. :)
You're pretty good at this, aren't you!Stop.Ohh~?Really~?How nice~Somehow or other, she mastered swimming.Okay! Then when you get bigger, let's go on an Orel Cruise♡Yeah! Ikazuchi will be a submarine!Okaaaaay!Isn't she just!All of us together♡I think it'd be fine if you stopped being a destroyer and became a submarine!Ehh~ You're really gliding alone there!Ehehe~