Yeah, sure. Write it down if you think you know what it is!

[And up on his bed, Yamamoto just yawned slightly, trying not to shift too much.]

Oh really? Well, coming up with codenames was fun anyway. It's like we're super secret spies or something, you know? But I'll call you Killua and you can call me Takeshi.

[He raised an arm in a weak sort of thumbs up motion.]