Ah, Ikalgo, another one of my favourite side characters. An octopus wanting to be a squid is both funny and works as some great deep characterisation. Killua certainly is right thinking that Ikalgo is cool.
And yeah, we also get to see some change from Killua. First how he doesn't run away from Ikalgos inital sniper firing, and then how he jumps straight into the trap. And of course deciding to save Ikalgo. Such a great moment from both these characters.