It'll probably be a 19.

Hmm? Why is Luke to in not red til the last bubble? Is that his 'angry' color?

Giant fuzzy die?

Nah it's probably akin to Pete's "special dice" from darths and droids... the ones that caught fire.

Because it's not really needed till then. The only character Luke plays is Luffy, and it's pretty clear he's the one talking. The last bubble didn't point anywhere, hence it needs colour.

you can not easily see who is speaking in the last one, that's why it is red

What will Luke be angry over? I got:
- that the treasure is now gone (it was used to make the restaurant)
- That Pearl/Don Krieg is trying to destroy the restaurant
- Something hit his hat
What do you think?

It seems like it is something Luke is actually angry over and not that's just in character. Otherwise how would Rikka know Luke is angry before he even said anything. Luke is actually making the faces we see Luffy making.

I believe it's the restaurant destruction, possibly with a side of "You hurt my friend."

that Gordon Ramsay is willing to die?

I think I see where this is going.
Alas, poor Helmüt.

He might be angry that after fleshing out the intense backstory might not get Sanji to join the party after all.

GIANT D20 OF RAGE!!!

This right here?
This is why you feed your party combat. if you dont they break everything.

Yep there are always that one two (freaking badass) players with a giant ass dice for special occations seem to recall at least two of my fellow players complained about how the loud sound hurt theme wars when i rolled my fist sized wooden D6 across the tanke. Pfft whimps!