Re-reading old chapters.
I really wish they'd talk more about Jirou. He may be the middle guy, but it'd be interesting to see a bigger role.
When Joa was introduced, it's quite a shock to see how normal he acted, and should expanded more on why he even broke rules.
On another note, still confused on when PAIR came with the Nitro to Acacia and the others. In one part of the manga, he's a tree that gives knowledge in the Gourmet World.
Seems a bit weird for a tree to be able to walk or why he/it is with the Nitro.