In Ooi-chi's Case

Huh?

Ikazuchi

Inazuma

It's alright!

Nano desu!

How to tell Ikazuchi and Inazuma apart?

If you fling a torpedo at them, the one that runs is Ikazuchi.

The one that stands still is a well-disciplined Ikazuchi.

As expected from you! You're so smart.

Who ordered the fries?